First Wetsuit Advice

I need help selecting my first wetsuit. I'm looking at TYR category 1, 1XU A:1, Blueseventy reaction, and Blueseventy fusion. The TYR category 1 seems to be the favorite right now. I'm not a terrible swimmer I started swimming in April and I swim about a 2 minute 100 yard I've been working hard to get faster. My main concern is good buoyancy and I'm planning on trying to get into norseman for 2015 and if that doesn't workout i'm gonna sign up for Celtman so does the suit make a difference for the colder waters? There's almost nowhere nearby to try them on. I might be able to try on the blueseventys and the TYR suits but I'm not sure if the stores will have them in stock there's not a lot of triathletes in my area that the places can keep stock of this stuff. Any recommendations would be great. Thanks.