I'm might upgrade from a 4GB GTX 680 to a GTX 780ti and sell my GTX 680. I'm not sure if it's worth getting the EVGA GTX 780ti SC over the standard clocked version? Currently Newegg lists the SC version for $729.99 and Amazon lists it for $719.99 but I have to pay sales tax if I buy it from Amazon due to where I reside, hence ending up being more expensive for me buying it through Amazon than Newegg. I would rather go for the reference cooler because there might be a small chance that I might buy a 2nd one in the future for SLI, at least I would like to have that option open, and I read that the reference cooler is better for SLI than ACX cooler. Is the SC version louder than the standard clocked version? How reliable are factory overclocked cards? Is it worth the $30 extra to get the SC version? Already $700 is more than I would like to spend on a video card but if I can sell my GTX 680 for a good amount then it won't be so expensive for me in the end and I get 3 free games with it.