As I've mentioned many times in previous threads - I wouldn't recommend buying a brand new AM3+ motherboard at this point in time. Your buying a motherboard with a chipset from 2011 - which lacks many new features and has no upgrade paths (no new CPU's will ever be released for the motherboard). It also performs horribly compared to the Intel alternatives, though the Intel's are a bit more expensive (you get what you pay for).
Do you have the budget for a I5 with a Z97 motherboard? It would offer you a much better system for gaming, all the new motherboard technologies, a full upgrade path (Broadwell being released later this year, will be compatible with Z97),will consume less electricity and will run cooler (awesome for the Summer months).
You mentioned you bought the new CPU recently - you could return it for a full refund and put the money towards an I5 setup, if it's within your budget of course. It's a much more futureproof setup, since you can simply upgrade in a few years to a I7 Broadwell CPU, if needed.