I love to listen to my 'Dutch Jewel' called ARROW CLASSIC ROCK!!! They have a lot of great classic rock music from most of the epic bands in the history of rock!
A great second (for the heavier sh*t) would be AARDSCHOK KinKfM!!!
Only one I really use anymore is gotradio.com. They have a lot of great channels, and play a broad range of artists within each genre so it gets me out of my typical list of artists while still keeping with my chosen genre.
I used to use Launchcast (terrible) but have started using Pandora. I pay for unlimited and use it on my phone. This is a great feature since I do alot of traveling and I have a relatively cheap commercial free alternive to radio that plays the music I like.