b.a.t. amps?

i've been steadily upgrading my system for the last month or so. the next and final step is an amp. my set up is: jm labs focal profile 918 speakers, rega apollo cd player, balanced audio technology pre-amp, jps labs interconnects, and audience au24 speaker cable. my question is, would i be making a sonically wrong decision going with an amp other than a b.a t.? a lot of people tell me that the best way to go is to match the pre amp is with a b.a.t. amp. anyone know of a different amp that would work with my system? thanks.