Let me guess....Fantasy Lake???  I was there a few weeks ago.  Viz
sucked.  You cooked on the surface and froze below the thermocline.

For temps dropping to the 50's I'd get at least 5mm... but most preferably a
7/5 or something like that.

Akone makes a nice 7mm jumpsuit,
http://s1059kxm.leisurepro.com/webapp/commerce/command/ProductDisplay?prrfnbr=10
29&prmenbr=946&cgrfnbr=982&parentCategory=980&sort=prsdesc

So does Bare:
http://s1059kxm.leisurepro.com/webapp/commerce/command/ProductDisplay?prrfnbr=28
44&prmenbr=946&cgrfnbr=982&parentCategory=980&sort=prsdesc

And, for even less money, Mares:
http://s1059kxm.leisurepro.com/webapp/commerce/command/ProductDisplay?prmenbr=94
6&prrfnbr=81318&merchant_rn=946

I recently bought a 3mm Evo (Divers Direct house brand) wetsuit that I'm
very happy with, they make a 5/4/3:
http://www.diversdirect.com/scripts/ecatalogisapi.dll/Group?Group=106&Template=9
990000001000999&searchn=0&maxresults=

For my money, though, especially considering you'll be moving to Ohio, I say
get a drysuit.  The guys at http://www.dansdiveshop.ca will be able to hook
you up with a Bare drysuit for a hell of a price.  They'll send you a
measurement sheet and make sure you get something that fits.  My ATR HD came
from them and I can't say enough about the excellent service.  You can also
find mad cheap Nexus suit packages on ebay that include everything for under
$700.

Failing that, I'd come up with the extra cash for a semi-dry.  Never been in
one, but they seem like a nice inexpensive alternative to extremely large
amounts of neoprene.
http://s1059kxm.leisurepro.com/webapp/commerce/command/ProductDisplay?prrfnbr=49
82&prmenbr=946

Jon

It is funny. Doesn't look like anybody (except for a couple of people)
have given you a recommendation regarding wetsuits. Instead, they have
preferred to demonstrate their extensive knowledge skills in
absolutely all fields.

Ok. It will be difficult to find a decent wetsuit for diving in 50F
for $150-200. Try http://www.leisurepro.com Anyway, they have the best
prices to my knowledge. IMHO a good wetsuit is the one that fits. Of
course, it is good to know if it is made from quality neoprene, but
most of well-known manufacturers use the same kind of neoprene, mostly
from Japan. I live in Northern California where a temperature of water
usually doesn't exceed 56F, so I'll tell you what I and divers I know
like to wear and that's it:)

Mares Isotherm Millennium (very good one, but they come only in 4-5
different sizes. Nor M or L suit didn't fit me)
Henderson Gold Core or Hyperstretch (good, warm, but stitches are not
the best quality)
XCel SCS Polar Tri-Density (I have this one. It is 9/7/6 mil , 9 is on
the chest, one-piece, hooded. I like it so far:) Good size chart. It
comes in every size imaginable. It fits like a custom one, very good
stitches)
Parkway Scuba SemiDry 7 mil (Pyrostrecth or Shark Skin) - This one is
not so expensive. You can find it at internet less than for $300. My
friends like it.

Some of my friends dive in Bare, Harvey's, Ocean Reef 7mil (7/5 etc)
wetsuits and they are pretty satisfied with them.

Again, find a wetsuit that fits you, made from decent neoprene, has
good stitches and zippers and you'll be ok.

P.S. I am not talking about dry suits here. They cost a lot more than
$200:))

You can always open up and vent a suit that is too warm or wear one
piece of it if it is two piece.   But if your suit isn't thick enough
and you're too cold, then you're pretty much outta luck and left to
pee into your wet suit for warmth.  Even that only lasts a little
while.

For a temp of 50's, you should be be wearing 7mm or a dry suit.

You need to pick a priority : Warmth or price. You might not have the
luxury of both. If I were you and thinking of moving to Ohio, I'd go
with a 7mm and figure on the possibility of buying a dry suit.