Although with the H67 chipset and the i5 2500, you are limited on your overclocking.
I have read that the H67 chipset does not support crossfire/sli which is what you are after.
In other places, I have read that it can. PCCG are selling H67 boards that support crossfire but the PCI express lanes run slower, therefore making a crossfire setup wasteful.
If you are going to run crossfire, then stick with the AMD build. You aren't limited to your overclock and you can run crossfire without a major bottleneck.
Alternatively you could spend a little more on getting a P67 board with the i5 2500 and all your problems are solved. You will run crossfire no worries at all if you buy the right board.
Link for P67 board -
http://www.pccasegear.com/index.php?main_page=product_info&cPath=138_711_1183&products_id=16387. $219
Both Pci Express slots run at 8x when running crossfire.
Either Karma's build or l_w_88 will both serve you well. Now just a choice of whether or not you can afford to get a more expensive board so that you can to run the i5 2500 whilst being able to use crossfire. If you can't afford this, then don't waste your money, stick with the AMD build.
Posted on Thursday, 6th January 2011