I've owned a number of amps over the years including Emotiva XPA2, XPA3 (twice at different times within a year). I really wanted to like the Emotiva amps because they put out a lot of power for a lot less money. I mostly listen to 2-ch music (80%) and movies (20%) and sound quality is my #1 priority but also taking into consideration cost. I have also own a Parasound A51, which is similar to the A21, but with 5-ch. IMO for movies, the XPA2 and XPA3 should do just fine, especially given the low price. For music, especially if you have good speakers, the XPA2 and XPA3 sounded good, has great detail, but just didn't excite me in any way, didn't have the fullness, warmth, and musicality of a really good sounding amp. After I sold my XPA2 and XPA3, And later purchased an Anthem MRX300 receiver for my exercise room running Paradigm Studio 100s, I wanted to buy a separate amp and use the MRX300 as a preamp. Didn't really want to spend a lot so I purchased the XPA3 hoping that it would sound better than the amp in the MRX300. Bottom line is I ended up selling the XPA3 and using the amp inside the MRX300. The XPA3 was more powerful, but soundwise, I preferred the MRX300.