Yeah I heard the i7 is pretty damn good after reading about it in music production forums. The benchmarks were good from what I was reading. In terms of making music, it out performed other CPUs if your thing was to use a lot of audio samples. Not sure about other stuff though like internet, gaming, video, photo editing,etc...
BTW, what does the i7 name stand for? Is the 7 for the upcoming windows 7?