Reference 3a mm de capo vs. ProAc Response 2

So here's the conundrum. I've got a Fisher 500c- 35 watts of vintage tube power (with several mods done to it-namely updated power supply and signal path) and currently have a pair of Vandersteen 2ce's. Not the best match, due to the Vandy's moderate efficiency, though still nice. Not especially dynamic and a bit congested on the frequency extremes.
So in search of a better speaker to match the Fisher, I've done lots of research on Reference 3A's and Proacs, which I'm told both work well with tubes.

So please, have any of you listened to both of the speakers in the title? If so, how would you characterize their strengths and weaknesses? Which did YOU prefer and why?
As for my tastes, I enjoy old school R&B, 50s-60s jazz, classic rock, some pop, bluegrass, reggae, folk. Not really concerned about classical. And my source is an Eastern Electric MiniMax CDP. No vinyl (yet).

Thanks a bunch for your valued opinions! Lincoln

PS- yes I'm working hard to arrange a listen to both of them myself, but Tucson, AZ, is a bit removed from lesser known brands. :)