If you are not gaming then a 790g series or 785g series mb from ASUS , gigabyte, asrock and other quality mb makers will be fine .
The 790g/785g has onboard gfx that are easily powerful enough for all uses so you wont have to buy a separate graphics card
Might as well make it an AM3 mb and use DDR3 ram so you have the latest technology and the longest future proofing