Granted, they're quite a bit under your budget, but they may work for you. The GoldenEar Triton Two towers have a rated sensitivity of 91 dB and are only $3K/pair. HOWEVER, they have built-in powered subwoofers and a single pair of speaker cables supplies signal to the whole thing. The most telling thing is that the designer/co-founder, Sandy Gross, co-founder of Polk and Definitive Technology, uses a SET to power his personal pair at home.
When you have 1200 wpc built-in to power the bass, you may find that 91 dB sensitivity for the rest of it will be enough.
Another possibility is the Zu Definition Mk IV. It also has a built-in powered sub, but sensitivity is spec'd at 101 dB and they're priced at $12,500/pair. However, the Definition Mk III is also in production, also has 101 dB rated sensitivity, built-in bass amp, and they're $7500/pair.
It's also my understanding that Zu structures their impedance curves to be friendly with low-powered SET amps.
When you have 1200 wpc built-in to power the bass, you may find that 91 dB sensitivity for the rest of it will be enough.
Another possibility is the Zu Definition Mk IV. It also has a built-in powered sub, but sensitivity is spec'd at 101 dB and they're priced at $12,500/pair. However, the Definition Mk III is also in production, also has 101 dB rated sensitivity, built-in bass amp, and they're $7500/pair.
It's also my understanding that Zu structures their impedance curves to be friendly with low-powered SET amps.