ASUS P8Z68V or Gigabyte Z68XP-UD3

hi guys, i'm building a new rig soon, planning to get the i7-2600k for it.

i'm hoping to run it on o/c 24/7, maybe at about 4.2ghz at 1.35V, depending on the stability of the chip.

any advice on whether to get the ASUS P8Z68V or Gigabyte Z68XP-UD3 for this? the gigabyte is about $100 cheaper where i am, and from the reviews i've read the only differences i can find are the lack of bluetooth and a missing PCI x12 slot. stability-wise would i be better off spending the extra on the asus?