Read this: http://www.anandtech.com/show/4456/s...e-buyers-guide
and make up you mind. Just to quote:
"It’s also a great time to build an Intel-based computer. The successor to LGA 1155 (the Sandy Bridge socket), LGA 2011, is not due out until late this year, and looks to supersede LGA 1366 at Intel’s highest-end of the desktop CPU spectrum. Other than supporting Sandy Bridge-E CPUs, LGA 2011 will offer PCIe 3 (which current GPUs can’t take advantage of) and native USB 3.0 (even though third-party USB 3.0 controllers are already shipping on many Intel and AMD motherboards). Considering how capable the Core i5-2500K and Core i7-2600K are today
, it’s unlikely Sandy Bridge-E will field any model that’s astonishingly faster than what’s already available. Thus, if you buy a Core i7-2600K now, you’ll be at the near pinnacle of desktop computing for at least 5-6
months. I think there are times to buy and times to wait. It’s a bad idea to buy right before a lineup refresh (as is the case with AMD today)
, but it’s also unwise to delay building a system to hold out for the next big thing when that’s half a year away and unlikely to be that much better!"