Certainly late to this party, the solution to your quandary is the Chapman T –8 MKII loudspeaker.
if you want something aesthetically pleasing but a little bit more money go to the Chapman T – 7 in the special rounded dual cabinet version.
There’s absolutely no need for a sub with the speakers as they go down past 20 cycles with response climbing even at 20 cycles. Incredibly natural sounding speakers with fantastic depth, resolution ,easy non-fatiguing listening yet with incredible life like detail. They look rather plain and simple on the outside but the engineering inside is extremely complex. Unlike so many other speakers where you pay for what you see – here you pay for what you cannot see but what you can hear… Isn’t that what a truly great value and accurate musical speaker is supposed to do?
The internal designs are complex involving transmission line cabinets, specially cured woods for bracing , elaborate acoustic silica sand chambers for the Crossovers whose components are potted in various hardnesses of sand dampening urethane, speaker wire is individually cryogenically treated internally, and the crossover design is quite advanced using extremely large and high-quality parts from some of the worlds best manufacturers of capacitors, inductors , resistors etc. by weight alone the crossover designs are typically 5 to 6 times as much as other competitors.
Ahem, remarkably the speakers are very easy to drive despite the electronics inside, and offer a very benign impedance to amplifiers. As such even with a nominal 89 db of sensitivity they can play satisfyingly lifelike and loudly with just 30 W of tube application. Yet they can also withstand 450 W of solid-state amplification provided you feel like throwing a dance party that night.