I've been wearing a Lotus Designs Sherman for about a year. It sits way up high, and has a big lump across the shoulders. I wear a rashie over it to reduce windage and keep it from snagging on stuff:
[Linked Image]

Yeah, it looks funny, but here's why I chose that particular brand / model:

When I was at the 16 Worlds in Mexico, we went into the pool with full gear on after our last race to chlorinate everything (it would stink really bad and never dry out otherwise). That's when I found out that the trap harness has enough flotation in the butt to turn you face down if you were unconcious. I was wearing a 2 year old Extrasport PFD. The Lotus PFD keeps you from rolling over.