Everything looks solid on there to me and you should be able to play most modern games without any hiccups. The only thing that does stand out is if you're not OC'ing then is there really any need to go for an aftermarket cooler. The stock AMD HSF units perform well enough at stock speeds. Hope this helps!
You haven't listed a graphics solution on the above system so its hard to say for certain. The graphics is probably the most important factor if you're gaming. Obviously you need a strong CPU and RAM to back it up but you have that in both examples.
I would go with your first build simply because of the PSU. The Corsair is a much more reliable and solid PSU than the Coolermaster. These official power requirements for your graphics card may also be worth you having a glance over:
500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)
These apply to the whole system not just the GPU.
So really speaking, if you weren't going to Crossfire in the future, you could save a bit of money if you you went with a good 500W PSU instead. Corsair, Seasonic and the newer Antec models are the way to go.