The XPA-200 is an excellent amplifier. I used one for 13 months with my Sierra-1 pair. In fact, I re-tasked the XPA-200 for Zone 2 rather than sell it. I really love that amp. Make no mistake, the XPA-1L does have some sweet features and I have no plans to sell mine. They are the kind of amps I dreamed of for a long time. However, comparing the
sound quality of the XPA-1L to, say, the XPA-200, I could not discern much (if any) difference
* with most music at normal listening levels. I tried really hard to avoid letting placebo effect and experimenter's bias creep in to validate my purchase.
*the usual disclaimer: with my ears, with my system, and in my room.