B&O RL6000 vs. B&W 602 vs. Peachtree D4


Strange proposition to weigh:
B&O RL6000 (vintage) vs. B&W 602 (used) vs. PeachtreeAudio D4 (new)
to be paired with a Peachtree Audio NOVA, for use in a small space (13' x 15').

How much sound quality would I be giving up compared to the B&Ws or the new Peachtree D4s ?
upc22