Maybe I should post here since I have the GTX 460 that you mentioned.
From my ManiaPlanet forum signature... here's my system stats... (I had it in my sig there for easy access by the devs during the beta):
Motherboard: Asus P8P67 PRO Rev3.1
CPU: Core i7 2600K
GFX: EVGA GTX 460
Memory: 16GB G.SKILL Ripjaws DDR3 1600
System Drive: Crucial RealSSD C300 128GB
Sound: Realtek ALC892
Case: Cooler Master HAF 932.
And here's my ManiaPlanet settings (right click... open in new tab to see larger):
The screenshot says I run at 1600x900 windowed... but that's just how I start the game. It makes it easier for tabbing between windows. When I'm actually playing, I always ALT+ENTER to go fullscreen.... which is 1920x1200 resolution (native for my 23" LCD). As the screenshot shows, I use High Definition textures.
The biggest track I have is a 3 minute 12500c track in sunrise mood and I get around 45-60fps on it all the way through the track. Very smooth, probably due to motion blur... as anything under 60fps in TMF felt really jittery (cause I refused to use motion blur as it was bad in loops). Maybe it's an unfair comparison anyway, because I was using a different card when I played TMF.
I get around 60-80fps while driving smaller tracks like my own Tortilla Chip Raceway.
I get 120fps in the editor (not that fps matters much there).