As for trance, I'd recommend listening to something from a few years ago.
A friend of mine (registered here actually), advised me to listen to Tiesto's In Concert 2003.
On his words, it's one of those sets that once you start listening, you just can't stop.
PS: Also, Tiesto's In Search Of Sunrise 6 has a beginning that I just love: the sound of sea slowly transitioning to trance.
You can listen to it on youtube, on a video with the first two tracks from ISOS6.