I bought rb99's MGSI15DT and I love it.Paired it with Triangle Titus and HarmTech melody line. Warmth plus accuracy and emotion.Upgraded with JJ/tesla KT88s from thetubestore.com My "B" system 's getting more hours than the big stuff (MF A300 with Vandersteen 2 SIG> ) ! want to hear all their other amps. John