My brother-in-law wants to buy an HP (I know building your own is better but he wants Costco's return policy) and he has a choice of an E6600 (@ 2.4) or a 5200 X2 (@ 2.6 and $50-100 cheaper). They are identical in all respects except CPU, which one would you recommend. At first I recommended the Core 2, but when I saw that the X2 has a higher MHz and cheaper I'm not sure anymore. What do you guys think?