B&K vs ADA which to buy?

Hello all, I am looking at a couple of second hand amps, older, so I know they may need to be re-capped and serviced at some point. I am currently running a Pioneer Elite SC-37, 4 NHT Classic 4 towers, and a Classic 3C, with an M&k V1250 sub. This NHT set seems to be a bit much for the SC37 (it will be moving to pre/pro duties with the amp) I have a line on either a B&K av5000 series II or an ADA PTM-8150, both about exactly the same price. The ADA is an 8 channel so I could Bi-amp my fronts with it. Any thoughts on which way this group would lean with my rig? Pricing on these is right around $450 so I am guessing there won’t be much new out there in the same range. Thanks in advance for any wisdom and advice on this- Jay