h61 if you are going barebone budget. In my opinion though, b75 gives the most benefits(lowest price to addons price, most b75 boards have 4 ram slots, 2 pcie slots, which rival low end z series boards, which all it really loses out in is overclocking, as b75 boards arent really built for it, but a 2120 isnt built for overclocking, so it fits the bill better)
h61 if you are going barebone budget. In my opinion though, b75 gives the most benefits(lowest price to addons price, most b75 boards have 4 ram slots, 2 pcie slots, which rival low end z series boards, which all it really loses out in is overclocking, as b75 boards arent really built for it, but a 2120 isnt built for overclocking, so it fits the bill better)