For your purpose the motherboard I suggested is fine. Not to say that Mal's suggestion isn't good but I don't see that you need it. H61 is fine and if Asrock decides to do a BIOS update to support Ivy, you'll have Ivy Bridge support. IMO just save a little on the motherboard, it's not like you'll need to support CF/SLI or PCI 3.0. We don't even use all of PCI 2.0 as it is.
LOLO WOOOPS MAL wrote the wrong word, I meant your board is good but he doesn't need it... My bad...
But yeah, Darz the H61 board the Asrock one, is sufficient for your needs. It'll give you the upgrade room of Ivy Bridge and USB 3 + SATA 3. Do you plan to go SLI or CF? I don't think you'll need to with online games. A 6850 is sufficient to handle most games on High settings with slight tweaks to the game settings. Depending on resolution of course.
Ok well then yeah. The H61 board suggested is fine. If the manufacturer gives the boards a BIOS upgrade, Ivy Bridge will probably be supported. The reason I say this, Ivy is not going to be a jump like Lynnfield to Sandy, Ivy is just a die shrink of Sandy Bridge so performance difference isn't exactly going to be huge but the architecture is the same.
IMO you should just stick with Sandy until Haswell releases in 2013.