www.djmixes2k.com - i get a lot of live trance sets from that place. Paul van Dyk ROCKS! If you have a high-speed connection, I could send you the one set by PVD I have that is amazing. What he does with 'Motorcycle - As the Rush Comes' is incredible.

Other notables:

DJ Tiesto - almost anything he creates
Motorcycle - As the Rush Comes
Paul van Dyk - We Are Alive, For An Angel, Forbidden Fruit, etc.
Armin van Buren - has some great songs and albums

Just get back to me...I have a 8+GB colllection of techno/trance.