I'm no use regarding the socks but have yet to hear anything great about the options either. Agreed on the foot and toe warmers, that's been my experience too. FWIW best I've found is leave enough room around your feet and, in cold water conditions (sub 45 for me), get out and walk 5-10 min when your feet start to hurt. About every 2 hrs in my case. Idea is not to warm up too fast or too much...when your calves start to itch you're done. Surprising how much that'll restore.
Sorry I know that doesn't answer your question but...
Sorry I know that doesn't answer your question but...