What are you looking to improve from your current sound?
All the amplifiers listed above are fantastic. The Pass amps will not have the tremendous bottom end of the Krell amps (nobody does bass like Krell for that matter), but do other things a bit better IMO, especially the XA models.
All the amplifiers listed above are fantastic. The Pass amps will not have the tremendous bottom end of the Krell amps (nobody does bass like Krell for that matter), but do other things a bit better IMO, especially the XA models.