A little help on choosing amps

Unfortunately I won't have a chance to demo, so I thought I should reach out on here.

I have the opportunity to purchase a used Pass X150.8 or Burmester 956 MK1 for roughly the same price. Which will synergize better with my system...I'm sure either will be a nice step up from a fantastic, but old, arc d120:

Fostex hpa8 dac
Arc LS 17se
Dynaudio 1.4LE

I mostly listen to minimal, drum and bass, and some rock. Bands like arctic monkeys, Zeppelin, volor flex, etc come to mind. In not a bass head but the music tends to have deep, sustained, bass lines. Im in an NYC apartment so my listening room is pretty small. Also, should I upgrade the dac in particular?

Thanks!