Yes due to the low availability i went with a Zotac Gtx 680, and i'm really impressed with the performance, way better than my old 560 ti SLI.
I was considering the 670 but on my country it is not even on sale right now...and in the very few places i can find it the price way higher than what i have paid on the 680...
Well what i can tell is, it worths the waiting.