I Need A New Playlist

Ok kids, it's time for a new gym playlist. I'm about to get serious about my running again after a super long winter and a chaotic month of moving between a house, an apartment and finally my new place. So the deal is this: I've been using the same workout playlist for two years. Seriously. It's sort of a pain to move everything around on my iPod, so I just tend to dump music on it and forget about it. This is fine... until the playlist gets so stale I want to scream. So I need some really good music selections.

Keep in mind I like cardio, specificlaly running but I'll also do the elliptical machine. I like to lift some light weights sometimes too, but I'm not big into strength training (although I should be). I tend to like to keep my workout playlists to metal - every once in awhile a pop song gets mixed in. Also, I don't want any classic glam mentioned - I own all those songs anyway and most are already on at least one of my iPods (one I use for my car, the other for training). So fire away. I'm anxious to hear what you like to listen to when working up a sweat!