Hannah...singing to music -- that IS the worst!!

I like Delerium, Crystal method, also just hookup with iTunes or someone similar and listen to stuff and see what makes you want to jump on your spinner and choreograph a routine!

Try:
Sam Cardon or Kurt Bestor (warmup stuff, 1st song, Kurt Bestor's "Sage of Lamberene" is a really nice warmup)
Bond
Safri Duo (great beats...try "Prelude", "Samb-adagio" are instructor faves)
Moodswings
Santana
Moby (his more upbeat stuff)
Blue Man Group
Enigma (good hill stuff)
AfroCelt
BT
Faithless
U2
Natalie Merchant (for cooldown)

So many!!