High gain wise, Tim recommended me the Warpigs for my SG and they are superb for dark, heavy stuff and work very well in the SG - great bass response and mids with some squeal at the top end (although not as much as some other BKPs). However you should be aware that you will not get a good clean tone with a Warpig without turning the pickup volume right down, which is a pain when playing live.
Nailbombs seem very popular in SGs round these parts, and give a more modern metal sound than the warpigs, which in Tim's words have "an ultra thick Iommi tone" :) Plus as they are lower gain, you get cleaner cleans.