No question the Dahlquist DQ-10's if you want a refined "audiophile" sound. They use the Advent woofer, which was the best thing about Advents, they're time aligned, and they have hands down the best midrange of any speaker from that era. And you can make them much better than they were very simply by replacing the horrendous Motorola tweeter with something newer and smoother, and updating the caps which are easily accessible from the rear.
Plus - they look much cooler than any of the alternatives.
Plus - they look much cooler than any of the alternatives.