I'll second the BPS hunting socks. They are good with lots of cushion. I still do get the cold feet but not as quick as I used to.
Other tricks I'm going to try this year: Poly. socks, merino wool then neoprene socks. May be too much bulk but we'll see. Poly socks, merino wool socks then metalic insoles I see being sold at CT. The idea is the shinny layer will reflect the heat back to your feet. If these don't work, back to the foot warmers.