I have a Garmin GPS V and am quite pleased with it.  19mb of storage and
I am using Mapsource Metroguide software.  The street level mapping is
pretty good but I have found errors in it.

I tried one of the StreetPilots (color screen and 128mb memory) and
really didn't like it that much.  I guess the main thing I didn't like
about it was lack of user programmed parameters on the map screen.  On
the GPS V, you have 4 user defined sub-screens.  The StreetPilot would
not let you define the subscreen function on the map page.  I enabled
the WAAS function on mine but for just driving around town, you really
don't need to be that accurate.  The GPS V has a monochrome screen but
excellent backlighting as compared to predecessor versions.  The
StreetPilot for all practical purposes is a mobile unit only, as it eats
batteries so fast, it really isn't practical for portable use.  The GPS
V will last 8-16 hours on a set of 4 AA batteries (depending on
backlighting etc).  Some of the auto routing on both units...will...get
you there, but I have tried it on both units, and sometimes they will
take you a bit out of the way.

The Metroguide software is fairly accurate on facilities such as
restaurants, municipal buildings, car repairs, etc etc.  Of course that
changes frequently as businesses change locations, go out of business,
new ones open up, etc.

The GPS V is in a water resistant housing.  I think it is rated for 30
minutes at 3 ft or something like that.

I can download my "tracks" from my GPS and follow the routes I have
taken recently.  I can also upload and download waypoints with the
Metroguide software, which makes it convenient when entering new locations.

I keep my GPS in my car and use a remote antenna on the dash.  All in
all, I like the GPS V.

Andy

For what it's worth, my Garmin Extrex Vista is 2.7 kilometers off on
it's internal map of the Lao border... We can't use WAAS but in that
part of the jungle I can get down to  7 meters (21 feet) accuracy. But
2.7 kliks can spell the difference between a nice trek and a week spent
in jail trying to explain why you were illegally in their country.

Steve Kramer
Chiang Mai, Thailand
http://www.photoenvisions.com

I recently retired my Garmin GPS 50.  It was, I think, the first of their
hand held gps offerings.  I paid dearly for it when I got it, but got my
money's worth out of it over the years.  It went from being primary on my 25
foot boat, to being backup on the big boat and primary on the smaller ones .
. . then it died.  When I bought my current boat, I wanted to upgrade to
color.  I bought the Garmin 2006c, a color chart plotter that used the blue
charts.  I purchased the fish finder module for it as well.  This is the
same as the larger 2010 except for screen size.  The 2010 was too large for
my available space.  Since I got almost nothing for the previous boat, the
black and white GPSMap 215 it had, became the backup for my new boat.  I
replaced the GPS 50 with a color chart plotter Garmin 60c, which is what I
use on my dinghy and on my 15 foot runabout.  It's a hand held, color unit
that takes uploads from my blue chart CDs.  There's a another color handheld
model that, I think, has a slightly larger screen.  BTW, my bicycles have
Garmin Geckos and my car has a Garmin IQue 3600 PDA/GPS.  I guess you could
say I like GPS toys.

At any rate, the answer to your question is probably to keep what you have
until it either fails or is no longer supported.  With Garmin, that's not
likely to be real soon.  Their products tend to be durable and their
customer service has always been there for me.  My 215, which is not Waas
capable pretty much matches my 2006, that is.  Since selective availability
was turned off, both are pretty good.  The blue chart chips/CD have a lot
more detail and information than the one in my 215, including depth contours
and more up to date channel markers, etc.  In the hand held, however, the
small screen really does not lend itself to that kind of detail.  It's worth
it on the 2006, but probably not on the 60c.  The color screen is very nice,
but you'll have to decide whether you want that badly enough to pay for it.
They don't come cheap.  I like my 60c a lot, but I did not buy it until my
50 gave up the ghost.

The primary advantages of the new software may matter to you, but nobody can
make the decision for you.  The blue charts themselves are more accurate.
My 215 still shows me motoring on land as I head out to the ocean.  The blue
chart shows me in the water.  The numbers, however, are the same on both.
It's the chart that's different, not the accuracy.  The blue chart products
also have searchable information, from tide stations and tide charts, to
restaurants, marinas and even bathrooms.  as well as a decent lookup
function to help you find what you want.

Lee

The real upgrade is the quality of the charts. Raytheon has a new one out,
forget the model, that takes the Navionics Gold charts. Very nice.
As for the GPS itself, 'bout the same, maybe a bit more accurate on that
end, however the increased memory and processor speed makes the moving map
positioning more "real time".

Minor point and deviation from the actual question.  Garmin has
recently come out with a "minimum retail price" policy.  Which means
everybody is selling at the same "low low price".  So there are no
longer any deals out there.