If you need to save money (as in I am on a budget), buy a Krell KSA-300s, this is the amp that many Apogee (very hard to drive) speaker owners use to drive their bass in Bi&Tri amped systems. This amp will drive your bass as well as any of the new Krell's. Get one thats been back to Krell in the last couple of years...they come up for sale here on Audiogon often at around $3,500 fresh from a trip to Krell service.
Dave
Dave