It's hard to choose but it is probably in this order
Solar Fileds - Leaving Home
Aes Dana - Memory Shell
Cbl - Hydrophonic Garden
Huva Network - Distances
Va - Oxycanta and some parts of Fahrenheit series.
At one moment i really enjoyed Cell live sets from Ketama, Glade festival ect..
Must admit that some ultimae cd's waren't in my player for a long time now but I still love listening to this listed albums.