The Adagio's are very SET friendly! Your Cary SLI-80 cranks out 80wpc in ultra-linear mode and 40 watts in triode which I think would be a match made in heaven with the Adagio. I ordered my Adagio's a while after RMAF, as the Zen room pulled me back for 3 lengthy listening sessions. I received them prior to xmas and I have tested them with a pair of SET 15 wpc 6C33 mono-blocks. We just moved into our new home on Jan 15th, and my new listening room is now quite large. I have a friend who is selling his deHavilland Ios ST 845 integrated, to move into a pair of GM70's. So I jumped on the Ios as at 27wpc, it will give me the oomph I need in my now larger room. As Kmillette mentioned at 89 dB and 6 Ohm nominal impedence, it would be easily driven by many tube amps.
