I second what David has said about modifying the BAT 75SE(150SE). He has listed the mods in order of increasing difficulty - easiest first. He has advised and helped me make the mods to my 150SE amps. If one is not intimadated by a soldering iron, these mods are quite do-able for the average audiophile who wants to get the most out of those amps.
Highly recommended.
Highly recommended.