I have a 680 GTX that I bought brand new for only $300 that I have a hard time wanting to upgrade so I can understand completely. A part of me wants to SLI it, but to be honest, Then in a few years I will be stuck trying to sell two 680 GTX's which will be worth even less then than they are now. It's like, No sooner than you get a top card, t gets bumped down the ladder and drastically drops in price. I remember it was just a few years ago when I used to have a 580 GTX and I thought that it was amazing. And before that, It was my 480 GTX, and before that my 9800 GTX+.