Melody I880, the last dozen years or so. KT88, tube rectifier, modified to add pre-out.
Before that was a POC Jungson Class A that was nothing but problems. Before that, Aronov LS960 a terrific, liquid, 3D, dynamic, with great bass and two volume knobs that were a pain to match. Great amp for about a dozen years until it started blowing fuses and died.
Before that were a couple separates, notably McCormack DNA 150, the nicest SS amp I ever heard. Frankly it was virtually as good as the Aronov, but required more $ in power cords and interconnect, etc, to get there, which is true to this day. That is why my next amp will again be an integrated. The Raven Blackhawk is in transit and expected next week.