How badly do you feel the cold? We're kiting in those kind of temperatures now but I've just this week put the 3.2 long sleeve/shirt leg suit into the cupboard and am now wearing a . . . 3.2 full length

cold doesn't bother me much, though...
FWIW Mystic is a kite company, its possible they may have designed their suits better for our sport eg. harness rubbing, and my next wetsuit will be a Mystic Star . . . so long as it has a chest zip. I've got right off back zips, even if they ARE easier to get into.