Hm...
If you listen to Dream Theater, I would suggest checking out
Queensr˙che - Operation: Mindcrime
Liquid Tension Experiment (instrumental project, keys, guitar and drums from DT, bass from King Crimson)
Pain of Salvation - Remedy Lane, or The Perfect Element, Part I (where the following samples are from)
http://www.painofsalvation.com/samples/used.mp3
http://www.painofsalvation.com/samples/flesh.mp3
http://www.painofsalvation.com/samples/ashes.mp3
http://www.painofsalvation.com/samples/morning.mp3