I bought a pair of Forte II's about 9 months ago. I ran them with an early 70's Marantz 2270, and thought they sounded great. I could only compare them to the early big Advents I had, but the sound was vastly improved. I had read here that tube was the way to go. Long story short I ended up buying a Cayin TA 30 w/all the mods from Paul at Bizzy Bee. I'm new to the tube amps but I couldn't be happier. Separation, diffenition and clarity are outstanding. I'm hearing a lot more music than I did before. My two cents says go with tubes. Good luck with your search.