I’m hoping to find a used or demo 590axii. I can’t swing a L-595 (a couple of dealer’s still have one...I’m sure they won’t budge on price). The 509x may be the ticket as well. My ZU’s are 96-101 db efficient so I can go low or higher wattage with no issues.
There’s one (L-590AXII) currently listed here on Audiogon, auction ends tomorrow.