I'd like to jump in and get some advice. I've got a Henderson polyofin fullsuit that is supposed to have the warmth of a 2mm without any bouyancy. I'd like to get a 5mm to wear over it for diving upstate new york. I picked out 5 possibles. They are:

Pinnacle Cruiser 5 5mm $110
Pinnacle Elastiprene 5 5MM $175
Neo Sport X-Span 5mm $190
Henderson Hyperstretch 5mil $235
Pinnacle Merino-Elastiprene 5mm $265

I'd like to spend as little as necessary but enough to get a suit that will fit well (stretch and fit tight) and be easy to get on. I'm 5'10" and 205 - fit isn't a problem.