I just got back from sweating my lowers off, tried on a few suits and broke the bank, settled for the Helly Hansen Alpha 1 float suit in extra large, fit really well, only issue was the hood has to be out ,not rolled up in the collar, I cant stand the thick collar that wont fold down, felt like someone was pushing on the back of my head, little expensive, but the delta 1 and delta 2 and the other one didnt fit like this one.Piss zipper,suspenders,pockets sold me.
good luck lew, but I'd have to say try one on, Iam 5'10-5'11,225 ok maybe 235! Fit well.
Cheers