I agree, especially Sonic 2 and Tails. Like you just had enough rings and BAM, Tails would run into an obstacle and lose rings he got, making you have less than the goal... oh well. And I still haven't got to try out Rush, so I haven't tried that one yet.
I have no idea, they're my favorite video game band, group, whatever that works for making music for video games. Knight of the Wind is awesome, and so is their remix of With Me. Though I must say, for nostalgia, It Doesn't Matter, both versions, for their own reasons. :>