I don't know if the megatexture was such a great idea. In retrospect ofc it's a lot esier to draw conclusions, not gonna fault id for trying something different.
The major issue will always be (i just don't see how it could be fixed) textures streaming while your moving fast around the game world and low resolution look of the megatexture. It's actually high res but it's stretched so much that when viewed up close, it looks like a game made in 2004.
I thought RAGE looked great up close; no worse than most Unreal 3 titles, anyway. On the open road, it just blows everything else away; nothing else even comes close. Even Crysis' open environments pale in comparison to RAGE's. Nevermind that it runs in 720p with 4x MSAA @ 60 FPS on an Xbox 360. That's so incredible as to be literally unbelievable until I experienced it myself.
I ran it at 1080p with 4x MSAA and never saw a twitch from 60fps on SLI GTX 460s and a Core i3-2105. Truly amazing.
The other reason I'm holding off is I intend to replace my box with a Kaveri if it performs decently. (...) The i7 920 setup I have performs well but (...) I'd just really like a fresh start at this point.
I don't blame you for wanting a fresh start, but I think i7-920 -> Kaveri might be a bit of a sidegrade, or worse.
Well, maybe you should take this opportunity to pick up some high-performance memory for that APU.