Micro Center is having a $150 special price on the
Intel Core i5 2500K Friday and Saturday only. You can get $40 off certain motherboards too (see bottom of thread). This is an AWESOME deal, easily the best gaming CPU out there at the moment.
These deals are in store only. You have to live near one to take advantage of the deal. You can order online and do in store pick up as well.
Confirmed motherboards that work (I recommend going with the GA-Z68X-UD3H-B3 probably the best for the price):
ASUS P8Z68-V LGA 1155 Z68 ATX Intel Motherboard
ASUS P8Z68-V LX LGA 1155 Z68 ATX Intel Motherboard
MSI H61M-P23 (B3) LGA 1155 H61 mATX Intel (DOES NOT OVERCLOCK)
GA-Z68X-UD3H-B3 LGA 1155 Z68 ATX Intel Motherboard
GA-Z68XP-UD4 LGA 1155 Z68 ATX Intel Motherboard