I've ordered a Stewart World 2.1 amp and a Demeter VTBP201s preamp. I'll be using them with my Bergantino HT112 and HT210 as well as my Epifani T-212, in various combinations. Will probably set up a 4 space, lightweight rack with a Furman power conditioner/tuner in the fourth space. Should take me a week or so to get the rig up and running so I'll post my impressions then. Thanks to everyone who gave me all the good, useful input on the Stewart. Your opinions were a big factor in my decision to go with the 2.1.