I use smartwool or Patagonia ULW socks, or for all-terrain shoes the REI quarters:
http://www.patagonia.com/us/product/...0-565&pcc=1128
http://www.rei.com/product/798620/re...ter-socks-mens
They are not cheap but for boxers the Patagonias are what I use home or on the road:
http://www.patagonia.com/us/product/...?p=32485-0-766