I love my Entec SW-1s with both my Sequel 2s (before) and my CLSIIs and Soundlabs (now). I have not heard the RELs, but I prefer stereo subwoofers and they would be very expensive (and probably overdone) as pairs. I have heard a pair of Vandersteens with CLSIIzs and was not impressed (but I don't think any of the four speakers were well set up).
