I presume you are looking for an 1155 board for your sandy 2500k correct? You should definitely go with the z77 chipset, in case you want to upgrade to ivy in the future for optimal performance. I just answered a similar topic on another thread, so I just copied most of the following below.
Here some good gaming mobo choices imo. Should be able to get some decent OC and sli support is there as well.
My choice for less than $150
Asrock
IMO
Asrock Z77 Extreme4 is agreat budget alternative at $135 (120 on sale now

). It will yield almost similar overclocks to boards less than $200, unless you want to milk every last megahertz of the chip, where more expensive boards will be better. If you are strongly set on less than $150, this is definitely the board to buy and is a good bang for the buck. Also comes with 8gb ram free at newegg for a limited time haha.
My choices less than $200
Gigabyte
If you want another board with more bells and whistles go with
Gigabyte UD5H. It got the Anandtechs editors choice and is about $180. In terms of Overclocking, it should do a bit better than the extreme4, however, this really only matters on the extent you plan to OC.
Asus
Asus P8Z77-V. You can't really go wrong with this board. It's $190, but comes with onboard wifi, which is a nice perk. Plus it's an Asus.....need I say more?
Anything more expensive (over $200) is pretty much overkill for a gaming pc mobo.