What are the best mobos for overclocking the i2500k at the moment?
In particular the lower price brackets
The best cheaper boards for the i5 2500k right now are definitely the ASRock boards. Buy one soon and you get an extra year of warranty. That said, Newegg has a sale right now on the ASUS P8P67 Pro ATX board for $179.99 with free shipping.
I am also wondering about this..How do we know the best mobo for overclocking the SB k-series?I do remember 1 rule in OC and that is not all mobos are created the same.
If you are going to follow a guide, I would suggest getting whatever board the person making the guide used (usually ASUS). If you are doing it on your own, both ASUS and ASRock are good OCing boards. ASUS has more "bells and whistles" while ASRock has much more "bang for buck."
Personally, if I was paying full price, I would get either the ASRock Extreme4 or Pro3. That said, I would have grabbed that ASUS P8P67 Pro for $179 with free shipping if they had that when I was buying a motherboard (I picked the Extreme4 and am happy with it).
I have an Asrock Extreme 4 with the 2600K and does what I need it to do (i.e. easy overclocks)
but with this new line of processors the motherboard isn't as important as it used to be. I would just recommend picking a P67 motherboard with the features you want. Once you choose the features you would like (2x SLI/Crossfire, no SLI/Crossfire, 3x SLI etc .... higher memory frequency etc.) just buy it and it will overclock the CPU fine.