Thanks for that link there, Brandon. very useful. Back to the original post, here is comparison between the i5-2500K and the A10-5800K:
http://www.anandtech.com/bench/Product/287?vs=697
There are game benchmarks at the bottom. So have a think about it, Amp; see what suits you. Throw together a who build and price it, then see what you think is worth getting. Maybe the A10 and an SSD would offer you better all-round performance, or maybe you prefer to have more CPU grunt? Or maybe you could squeeze in SSD with the i5. It all comes down to how much you want to spend, what you want to do with the rig, and what's available at the time. Either way, I don't think you'll be disappointed. Maybe you could pit a list together of the the total system, if you would like to, so we can see it?