Honestly I would love to sometime hear one of the XA or XS series amps just to see how much more of that Pass love comes out in those amps over mine. As much as I love how mine sounds I would say that the XA or even better the XS amps would be like being in audio heaven. Too bad the XS amps are the price of a Mercedes and I will probably never be able to afford one on a good year not to mention the price of the associated equipment needed to give them their due.