720p woudl be prefearble over 1080i, and the PS3 is limited in resolution anyway.
You can get 1080p on the 360 version (well maybe nicer once the streaming of textures is turned back on), but that is still upscaled from 720p.
The only way to play in a smoother 720p and 1080p is with the PC version, and you can still use a game controller.