Zach has the XP-20 under review and is awaiting the XA-100.5 monos. I won't let the whole cat out of the bag, maybe a paw or two though... when he's (Zach) ready.
The XS has more 3d and the bass is soo god,, it is difficult to explain you have to hear it, I have this privat now, XS150 XP30 and Sr1 cardas Clear,, I can only say that is the best system I have had in my home, and over last 10 years I have had over 3000 system.... in my privat home.