>>4Looks really interesting, thanks! Hadn't actually realised Designer's Republic had done work for other games. In that vein I'd recommend any of the Wipeout series; all of them are good, but the PSP ones have a really hypnotic endless mode where the speed just increases every lap. 2097 had the best soundtrack though.
https://www.youtube.com/watch?v=YxtCoSlu-8A