Before you go buy a Sandy Bridge CPU for Linux use, please read this first.
http://www.phoronix.com/scan.php?page=article&item=intel_sandy_breaks&num=1
Peace.
http://www.phoronix.com/scan.php?page=article&item=intel_sandy_breaks&num=1
Regardless, the Intel Sandy Bridge CPUs are very fast, but even if you jump through the steps to get the graphics drivers working under Linux, at the moment they are not exactly working well in all cases. The investigation is continuing so you can expect more on the matter in the coming days and weeks...
Peace.