Sounds like you have my ipod, Neon!
Sevendust is my very favorite for heavy lifting.
Wired All Wrong is awesome during interval training.
Jamiroquai keeps aerobics interesting.
Also, The Prodigy can pop up at any time for a bit of extra energy!
Of course, there is a lot more in my mix; these are just the ones I have noticed really get me going so far.