I used to run a rotel 990-BX with a TAD-150. It was definitely an upgrade from the rotel RC-995, which was one of rotel's higher end preamps in the late 90's.
I have now replaced the rotel 990-bx with a mccormack amp, but I was very satisfied with the TAD-150 and rotel 990bx combo. hope that helps.
I have now replaced the rotel 990-bx with a mccormack amp, but I was very satisfied with the TAD-150 and rotel 990bx combo. hope that helps.