My favorite list (it's not easy, but i try):
Arena (Of course ;))
Neal Morse
Marillion
Porcupine Tree
Anathema
Blackfield
Kino
a french group ---> Seven Reizh (great album 8))
Now i've discover Overhead 8) You can buy it here --> http://www.progressivewaves.com/FrmChronique.aspx?ALB_ID=1339&EFF_ID=16
I think you have to update your list, mister J !! ;)