Guys, remember he’s looking for to keep it under $2500. You aren’t going to find any of the newer (past 5 or so years) Pass Labs or Mark Levinson stuff for that price even on the used market. You can, however, find Nelson Pass designed First Watt amplifiers (his other amp company) used in that price range. For under $2500 I think your best amp options would be a used First Watt J2 or Parasound Halo A21. The J2 if you have efficient speakers (think >86dB) and the A21 if you don’t as it will have more output. The A21 stays in class A for the first 7.5 watts per channel and then goes to A/B up to 250wpc, but the J2 is pure class A putting out 25 watts per channel but that’s it so you can see why having efficient speakers with the J2 is key. The J2 will sound better, but the A21 is no slouch either.