Your selection of i5 2500 sets two things: you need an 1155 socket, and you will not be overclocking.
Chip Set:
Since you cannot OC a 2500, you can use:
- H61/H67: This will allow you to use the 2500's on-chip graphics in an emergency.
- P67: This would allow OCing (but you would need a 2500k), but not permit use of on-chip graphics.
- Z68: Allows both OCing of a "k" cpu and the use of onboard graphics.
If you stay with the 2500, there's no point in getting the P67 chip set. Your choice of H67 or Z68 should be based on price.
Next is SLI/Crossfire:
If you want to protect against the need to add a second graphics card, you need a mobo with 2 x16 PCIE slots and each must operate X8 or x16 electrically (not x4) when two video cards are installed. If you do this, it would also make sense to consider a power supply capable of supporting 2 video cards.
Since you are using a 560, the mobo must support SLI. Mobos that support SLI also automatically support Crossfire. The reverse may not be true.
If you choose to forego SLI, you only need 1 PCIE x16 slot.
Next is Form Factor:
mini-ITX (1 expansion slot), microATX (4 expansion slots), and ATX (6 expansion slots) are your basic choices.
If you need only 1 PCIE x16 slot and no other expansion slots, you can use mini-ITX.
The use of mini-ITX or micro-ATX depends on price, how many expansion slots you want, and to some extent can determine case size (range).
Other:
USB: Any mobo you buy should at least support 2xUSB3.0 ports and have a number of USB2.0 slots you are comfortable with. You might want an external disk drive to run faster than they did under 2.0.
SATA 3.0: Probably a good requirement. Most disks today aren't fast enough, but you might pop an SSD in there soon that would benefit.
PCIE3.0: I wouldn't worry about it.
Conclusion:
Assuming you don't choose a 2500k and assuming you don't want the smallest possible case: any H67, mATX or ATX mobo from Asus or Gigabyte meeting the requirements above is fine. Purchase based on price.
If you go with a "k" cpu, then you would want a Z68 chip set and to spend a little more than the minimum to beef up the OCing capabilities.
Hope this helps.