I have in my main system an Emotiva XPA-3 Gen 1 (purchased back in 2009), XPA-200 Gen 1 (purchased in 2011), XPA-200 Gen 2 (purchased in 2013) and a BasX A4 (purchased last week and it's on the way). Also have a BasX A2 in my bedroom and waiting for the A3 to be back in stock to order one for my bedroom as well. My XPAs amps have been trouble free since day one but I have read that the last generation of XPA amps (Gen 3) have had some issues so I will let others that own Gen 3 to chime in. I was about to purchase a Monoprice Monolith amp but my OCD tells me to get an Emotiva amp so all my amps match. But if I needed to do it again from scratch, I may go with either Monoprice Monolith (ATI) amps or other brand like Nord or Parasound.