I have a 4670 that I have not unpackeged yet. The new 5570 looks better on paper, but does it offer me anything graphically that the 4670 does not. Iam not ineterested in dts audio or eyefinity at the moment. This if or an htpc. Will the 5570 do a better job of upscaling lesser video. What about the 5670 or 5750.