No point comparing the i7 2600k to the X6 (doesn't matter which one).. The i7 will beat it in all departments... which again is a very handy feature for you to use..
Thanks a lot man! One more thing, if I do get a separate gfx card will the quick sync still work or does it only work with the processor integrated graphics card? Also which mobo would you recommend? Between H67/Z68?