my (and many many others) pick of the current crop of wetsuits are the ones being made by spetton at the moment. open cell neoprene so you will need to lube it up before use, not nearly as bad as it sounds, but they are super stretchy and the most comfortable wetsuit i have ever worn by a long shot. being open cell they are warm too. plain black model is only 300 bucks too (thats what happens when the importer sells direct). some other options which i have not tried personally but have heard good reviews about are the deep sub suits, same importer as spetton and the new suits being imported by tony heugh.
my personal recommendation is either the spetton or deepsub suits. the importers name is roy and he runs AGRO dive imports. i can't stress enough how excellent the servic e is from him. he'll give you all the help you need sizing the suit, answer any questions you've got and reply to emails quickly. i tore my suit first dive (totally my fault, me being lazy) and mentioned it in passing on a forum. that same day i got a call from roy to check whether i'd sorted it out and repaired it (even offering to fix it for free).
DEEPSUB
SPETTON
TONY HEUGH SUITS
they are all 2 piece, open cell suits. all top quality and really well priced.
when it comes to gear i have no problems paying a premium for top quality gear and highly rate my spetton suit.
open cell basically means the neoprene doesn't have a nylon lining on the inside and feels like rubber. because of this you need to lube up the suit before you put it on. sounds like a hassle but all i use is a bottle of water with a little bit of shampoo in the water, squirt a bit inside the suit and sldie it on. if you use an old shampoo or detergent bottle with a pop top it's really easy and once you get used to it the suit will slide on easier than a regular lined neoprene suit.
EDIT: as far as camo vs black here are my thoughts:
stay away from blue camo, blue is the last colour to be filtered out by water and as such, if you're wearing blue you will stand out like dogs balls.
green is similar but not quite as bad as blue. the best colour camos are the earthy/red based ones. red is the first colour to be filtered out and you will blend in much better as well as being more visible to boats on the surface. grey camo's work well too.
for general use, especially down south there is nothing wrong with a black suit. they've worked well for 50+ years and many top divers still wear them in comps.
camo vs black is a pretty hot topic and the outcome always seems to be inconclusive but if it makes you more confident you will dive better which in turn means you will get more fish. on the other hand, many people believe camo suits have more effect on the guys at the boat ramp than they do on the fish.
food for thought.