If you live in any major city and have a Microcenter near you, they have the i7 930 for $199 - the same price as the 750. For the $170-$220 you're looking at, you can get an MSI x58 Pro-E, the ASRock X58 Extreme or a Gigabyte GA-X58-UD3R for the same price. I'm amazed that people still look at the i5 750 or i7 860/870 when you can get the 930 for the same price and have a machine that's quite a bit faster. Of course, if you're nowhere near a Microcenter, and NewEgg (or similar) is your only option, then the 750 is cheaper. In that case, go for the UD4P - no clue why the UD6, or any 1156 board, needs 6 RAM slots or 3 PCIe slots...AND costs $65 more (pre-rebate).