I have just had a lucky win, and am going to uprade to Haswell, with an MSI board but am unsure which one to go for. the 2 cheaper boards the MPower and MPower max look to be the same, I can't see any difference, and then there is the big daddy the Xpower, but is it worth the £350 price tag compared to the others at £200 and £220. What would you all recomend ?