LOL. Asking someone what's best to wear in winter is akin to asking what's the best light tackle rod/reel combo. Everyone has their own preferences and swears by them.
Nothing wrong with what Hammer suggested (he's ACA certified, I b'leeve, which means he knows his schtuff), and I'm certain that way works, but if you're considering the waders route, for clarification: waders, then wader belt, then drytop, then PFD.
Then you don't sink.
This is me:

