Drop the I5 and go for an AMD FX 8 core beasty, you will love it, it is also more likely to be cheaper for you and save you money, to upgrade that graphics card...
Stick with Asus though, Asus = Quality...
Just to give you an idea.
http://www.ebay.co.uk/itm/AMD-X8-Co...2?pt=UK_Motherboards_CPUs&hash=item27ccee204a
Much faster than an I5, and cheaper... Why oh why do people go for crappy I5's when you can get an I7 equivalent, at a much cheaper price? And before you all start I am not Intel bashing, I love em, but even I could not see the sense in buying Intel, when AMD have a really nice FX processor on the market now...