Krell KAV-250a/3 or Proceed HPA3

I have an opportunity to purchase a Krell KAV-250a/3 for almost half the price of a Proceed HPA3. I need one to power my B&W N804 and HTM-1 speakers. I've heard the Proceed. Loved it. Unfortunately I have no way of listening to the Krell. The question is, is it worth buying one site unseen? I know this is anethama for many of you, but bear with me please. Economy is tight, but I REALLY need a good amp NOW for these speakers. For your knowledge, I am using a Proceed AVP now for surround preamp. Not sure if Proceed plays best with Proceed or if pairing the AVP with the Krell would be like fire and water. Thanks.