I have Proline breathables. Ok so far. I'm not thrilled with them, but they're ok.
Paul has Snowbees and raves about them.
I've heard good things about Cabalas breathables, specifically that they stand behind them forever.
Bucktail had a post awhile ago explaining the differences in wader types. Good info
http://njsaltwaterfisherman.com/forums/index.php?topic=3584.0Breathables is probably the way to go vs neoprene. The neoprene keep you warm, but in our climate that might be a bad thing. I haven't been too warm in the breatables yet, but I bet I would have roasted in neoprene a few times already.
I know you've mentioned you're a big guy, so you're probably gonna want to shop somewhere you can try them on rather then order online. i had the same concern due to the fact that I'm extra tall.