I too have been pondering all this, since it was so dry down here, already thinking boating in Jan... of course February fixes that nearly every year, but still want to be prepared!
I ordered an NRS inversion Drysuit, It seems very nice, Bomber material, for non gore-tex. Have used their dry top for a while with good results.sealed zippers are very stiff. but... its too tall for my height, so I will have to send it off to get altered by RainyPass in WA...for $200-300...:/ I am considering skipping that and having a a suit custom made by Kokatat. i will have to call for an estimate.
NRS has top notch Customer service, and I am decked out almost head to toe in their gear, (pro deal through the summertime job rafting.They do hook it up for outfitter pricing. Its really hard to beat. very kind of them.) but if I spend all the $$ to alter something, maybe I should get it Customed and waste less... that is If its not like 2g's
IR stuff looks sweet too tho.