Buy time: Soon
Experience: 2-3 builds over past 10 years - both AMD & Intel
This is primarily a gaming rig.
I have a 23" monitor and run 1920x1080.
Playing BFBC2 and hope to get into Arma2 as well as future proofing it a bit.
Looking to keep it under $800 for mobo, cpu, ram & gpu.
Leaning AMD due to price.
And I've never overclocked. I could always learn
Not SLI/Crossfire now but perhaps down the road (need to understand how to do this)
However, your parts selection isnt the best, and with a 1055T, you will probably need to buy a cooler and OC to feed crossfired 6870s. But since your gaming only, the 955/65/70BEs would actually be better choices especially if you're not comfortable with OCing. FInally, 8GB is overkill, gaming is perfectly fine with 4GB and you could always add more down the road.
However, the 470 isn't a horrible choice, so if you REALLY like it alot you can go ahead and get one, though you might want to get a cheaper 870 Mobo while doing that as the 890FX chipset's extra features wont be worthwhile anymore.
No issue with going the gtx 470 route, but the 6870 is very close to the 470...and you would have the option of going a second one in 6 to 12 months for cheaper. Xfire is giving 70 - 90% returnes on the second card now as far as performance...which would be a fast gpu setup