My setup is a variety of options. I have both 3.6 and 1.6. I use the 4BST in the bass and a tube amp for the midtreble on the 3.6. I use either Quicksilver Silver monos or an Eicho HF 89 Modified to put out 70wpc and modded with v-caps, and everything else possible. I have tried 7BST and they have more oomph in the bass at higher levels. The room I have is about 25X28, and is big, thus it needs some power. I use the XM44 in addition. I have tried the Spectron Musician III, Rotel 1080, which was great in the bass, and the Music REference RM9 MK II, which was also very good. The Spectron was ok in the bass, but nowhere else. The important questions are your room size, type of music, and how loud do you listen to music, and the position you like to hear music, meaning do you like a front row perspective or a mid-hall perspective. To get the deep stage, the speakers usually need to be out about 6-8 feet from the back wall, and this takes more power.
Jallen