Hm when I think of innovative games, I think of Half Life, WarCraft 3 and Aliens vs Predator. Problem whith those is that they're too polished!
I was also kinda thinking 1080A vs SSX3. 1080 has cool stuff as speed and nature, while SSX has more balanced gameplay perhaps.
But then I realised that 1080 misses a lot that SSX3 has... like LONG tracks and cool trick system.