I want to move to SNB but right now, if I do, I can only do so cheaply. Therefore, I'm looking at the cheapest H67/P67 boards and I'll move to a Z68 mobo after - if I go this route.
So, here's my two cents. I based most of my analysis on price.
PRICE:
NCIX.com - Buy MSI Z68A-GD65 B3 Z68 ATX LGA1155 DDR3 2PCI-E16 3PCI-E1 2PCI DVI HDMI VGA USB3 SLI SATA3 Motherboard - MSI/MicroStar - Z68A-GD65 (B3) - in Canada
$150* (limited price discount)
ASRock Z68 Extreme4
$190
ASUS P8Z68-V Pro
$192 - $198
ASUS P8P67 Pro B3 is a good board but at $163, you're only $30 away from having the benefits of the Z68 boards.
But, if on a budget, I'd make the two contenders the Asus mobo and the MSI Z68 board above.
The Z68 mobo gives you a backup video solution and with the i5-2xxxK and i7-2xxxK processors, you get the Intel HD 3000 video. Even if you don't use it, it's a decent backup solution.
There's other benefits but I really don't think they are worth all that much if one has to pay extra for them. P8Z68-V PRO is about $30 more than the P67 series Asus board.
But, if you don't care about onboard video and always use discrete cards, then the P67 boards are fine. Imho, the ASUS P8P67 series is among the best and you get the UEFI Bios.
From what I read (although, this was at least a month or more ago), they all have some bugs or issues so I think I'd choose a board with an UEFI BIOS so probably Asus. Imho.
Of course, I'm on a super low budget if I move to SNB, I'd probably just go on price but Asus has some cheap boards as well.... If it has UEFI, it's a bonus.