My Vote:
Intel i7-4770K
Reasoning:
I would take the i7 for a number of reasons. For starters, it will consume less power and generate less heat than the AMD alternative. Nect, you said your primary focus was gaming, there are both quite a few games that favor Intel CPU's due to using abstract instruction sets, and a lot of games that use 4 or less threads--which also favors Intel. The only games I can think of where AMD CPU's are on equal footing and there are up to or more than 8 threads supported, are Battlefield 3 and Metro 2033. Now even with those two titles, BF3 somewhat favors Intel CPU's as well as supporting a maximum of 8 threads--which would lead to the i7 outperforming the FX-8350.
There's also the fact that even though next-gen consoles will have up to 8 threads available, it doesn't immediately mean every game that comes out will support 8 threads. It will probably take 2-3 more years to see games optimized for that, which means the hardware in question will already be up to 3 years old, and still kicking, at that point, there will be substantially faster hardware available from Intel and AMD, and what you picked at this point will almost seem irrelevant. The fact is almost all games being released this year will probably use 1-4 threads, and most of the games for the next ~3 years will probably use ~4 threads.
Now there's always the argument about going AMD to save money, because you can always upgrade in the future since they stay on the same socket. Here's what nobody here has mentioned; there is only
1 AM3+ motherboard on Newegg that lists having PCI-Express 3.0 sockets, and it's $200. By comparison, there are dozens of Intel Motherboards that feature them--every 7x series motherboard to be precise starting as low as $75. This means if you upgraded your GPU, you risk a chance at a noticeable bottleneck not too far down the road--sure, current PCI-ex 3.0 GPU's don't take a huge performance hit from dropping down to 2.0, but what about the next generation of GPU's? And what about multi-gpu setups for that matter?
The obvious retort would be "well he can just buy a new mobo when PCI-express 3.0 is natively supported", but then you're adding additional cost in the foreseeable future--something this guy is explicitly trying to avoid. You'd be looking at buying 2 motherboards, a cpu, and any gpu expenses, and that $100-150 you saved has been completely voided.
I see nothing wrong with that 
