We don't see many high end CPUs matching with lower mid-range graphics cards.
Most games are GPU limited before they are CPU limited.
In other words, for most games more GPU than CPU makes a lot of sense.
That's true, I was actually thinking about x4 965 BE, but no future proof though... 4 cores are awesome for gaming right now, but maybe after a year or 2 most of the games might require more than 4 cores...
The thing about games is that no game developer or publisher will ever design a game that will only run well on 6 cores. They'd loose the other 90% of the customers who are going to be on 2, 3 or 4 cores for years and years to come.
BATTLEFIELD BAD COMPANY 2 with: Minimum Recommended
Operating system Windows XP (32-bit) Windows Vista or Windows 7 (64-bit)
CPU Dualcore 2 GHZ Quadcore
Memory 2 GB RAM 2 GB RAM
Hard drive space 10GB for disc version or 15GB for digital version
Graphics hardware GeForce 7800 GT / ATI X1900 with 256 MB VRAM - DirectX 9 DirectX GeForce GTX 260/ ATI Radeon HD 4870 with 512 MB VRAM - DirectX 10
COD: Black ops
Operating system Windows Vista / XP / 7
CPU Intel Core 2 Duo E6600 or AMD Phenom X3 8750 or better
Hard drive space 12GB
Graphics hardware Shader 3.0 or better 256MB NVIDIA GeForce 8600GT / ATI (AMD) Radeon Radeon X1950Pro or better
I really have no problem with either of the X6 CPUs.
But I do think you'll get better gaming performance with a better video card.
If that means going with a x4 955/965 so you can get a better GPU you'll come out ahead in gaming performance.
Notice the BF:BC2 recommended graphics cards for DX10: GTX 260/HD 4870? Both those cards are slightly more powerful than the HD 5770 you plan to get.
I'll be honest, last guy I helped with a build wanted Sandy Bridge, but had a smaller budget. Long story short, talked him into a X6 1090t and upgraded the video card to a GTX 570. He LOVES it. My point is, I think you would be wise to step down to another processor and go to a better card. Also, do you have a microcenter nearby? If so, check them out, a lot of times they run deals where you buy an AMD chip, get a free board, or get like 40 off any board when you buy an AMD chip. So that means you may be able to get a processor you want and still grab a 460 or similar card.