I also need some ideas for a new workout playlist....
To give you an idea of what will work for me-

My favorite band is Tool (And a perfect circle, I sure love Maynard)
but most of the songs are not upbeat enough for me to workout to.

As bad as it sounds a few dubstep-ish songs work to pump me up for workouts.. But not too much

I love- against me
blood brothers
bullet for my valentine
disturbed
five finger death punch
halestorm
killswitch
msi
offspring
otep
pantera
protest the hero
slipknot
volbeat

so if you have anything to add I'd appreciate it