Utley -- Yes, there could definitely be overkill. I doubt you'll use all the power the monoblocks have. So after that, you're talking about subtleties of sound that depend on the amp model. And I don't know whether you'd hear them (or I'd hear them), or whether they'd matter to you. Also -- if you don't need the power, it might make more sense to consider a more expensive amp with the power of the XPA-2. But having heard about a zillion amps over the years, I'd say that a more expensive amp isn't going to buy you all that much.