Waders - purchasing advice

I plan on purchasing a pair of waders for this fall's steelhead
fishing season, and would appreciate the advice and opinions from
others more knowledgeable than I.

The local Orvis store recommends breathables vs. neoprene as being the
warmest coupled with a pair of fleece pants. The issue is I am a
diabetic, and as a result I have poor circulation and require waders
that will be warm in the frigid waters we fish in here in
Northwestern, PA. The rubber hip boots I wore last year just didn't
cut it.

If anyone can point me in the right direction I would appreciate it.

Thanks,

Dick Williams