Audio Metallurgy ICs other than GA-0

I'm looking for new pairs of RCA ICs, and while I know the Audio Metallurgy GA-0 is well liked around here, I'm not sure I want to spend quite that much on ICs. I'm thinking more in the range of $100/pair, rather than the $200/pair the GA-0's are selling for at auction.

That being the case, has anyone had experiences with the Ag-0, GA-2 or GA-3 ICs? These appear to be much more reasonably priced. Thoughts about the value per dollar of these ICs vs. something like AudioQuest King Cobras?