Budget wise, if you need/want to utilize integrated, rather than discrete, graphics, the current top of the line A10 (7870K?) can be had at Micro Center WITH a top of the line Asus A88X-Pro (don't remember the exact name) for right around 300.
A buddy of mine justpicked up the combo for use in a dedicated ARMA II/DayZ server, along with a 256GB840Pro (ano ther discount on the CPU/MB when purchased together), and a few other bits. Samsung WundeRAM 4x4GB already owned (does 2400 9-11-11 pretty easy), same with drives and such.
It runs quite well, but it will be getting an Intel dedicated 4x1GB + 1x10GB NIC, and I am giving him a deal on an LSI SAS9265-8i I don't have any use for anymore (I just upgraded a few cards to the new SAS 12GB/s cards) for use with a quartet or more of WD10EZEX 1TB drives in RAID10.
The above is to benefit the server aspects, not really anything else. The machine is quite punchy especially considering the fact that there is a giant open space where the GPU is supposed to go!
However, if you have or will have a discrete GPU, I don't recommend AMD as the APU will lose most of what makes it special, and the FX chips are too big, too warm running (and with too low of a thermal overhead), too poorly optimized for multithreaded loads, generations behind Intel regarding IPC (single thread performance), and the chipset is nothing more than a fresh coat of paint on an otherwise ancient platform that requires 3rd party controllers for way too much...
I would grab a cheap i5 or an upper end i3, and pair with a decent board from Asus, Gigabyte, or maybe possibly ASRock. Asus/GB are the only companies that I have not even one time had break, and every Asus board I have, going as far back as my SK8V Socket-940 board for my FX-51 (the real FX chips, which were the first time AMD beat Intel in fact they demolished them... The new FX chips don't deserve the name, it should be reserved for actual revolutionary products, and all the current ones do is ruin a historic name, and if AMD should ever happen to better Intel in the future, the FX name won't mean anything; instead, they cashed in on the name purely for profit, and proving that they're no better or worse than Intel ethically, and making fanboys "arguments" collapse under their own cheetoh encrusted weight). I have P4 boards from GB still working, as well.