So I ordered a HSPig-90 and an Alnico V Warpig for my SG about a month ago and have finaly gotten them installed and tested.
The Pig-90 went in the middle position and the Alnico V in the neck. They both sound awesome and have massive amounts of bass, gain, and sustain.
I have recorded a bunch of sound clips with comparative takes on all three of my pigs (the bridge pup is a ceramic Warpig) and will post them in the 'sound clips' section soon.

(sorry for quality, I'm not so good with a camera!)