Schiit offers mail order additions less re-stock of about 10% IIRC, but I am not sure if it will drive the 2.5’s well
either fit your budget?
BTW - not trying to drain your wallet but the new x.7 series is a huge improvement over the x.5’s (which I used to have) - Maggie used to have a we ship you a trial set of 1.7’s - may still do that