Both models but the 150 SE's for me is my favorite BAT amp. Sure the REX and REX 2 amps are also good, I've compared a stock REX to my upgraded 75SE, my unit simply blows it away, its because of the quality of parts I use. Sure if I put the same quality parts in the REX my unit won't stand a chance, but it's the cost factor, I can't see spending that much and having to rip out parts to upgrade it.
