When I had a pair of the 805S monitors, I used a 150w/ch NAD C372 (solid state) and was pleased with the result. I've also heard the 805S's with the newer NAD C375BEE (also 150w/ch solid state) and perceived that to be a definite step up from the C372. The C375BEE sells for $1,500 new. The NAD M3 (180w/ch solid state) would be yet another step up. A used M3 can be had within your budget.
I'm currently using Musical Fidelity M6PRE/M6PRX with B&W 804 Diamonds and really, really like the sound. The Musical Fidelity M6i (200w/ch), a lower priced integrated version of the separates that I have, lists new at $2999 but can be had used for much less. There's also the M3i integrated (76w/ch) which lists new for $1500.
To my ears, NAD with B&W leans to the warm side of neutral whereas Musical Fidelity leans to the analytic side of neutral though certainly not harsh.
In the tube arena, you might want to consider the Rogue Cronos Magnum 90w/ch, but it may be a bit above your budget. I see there's a used one listed on Audiogon for $1699.
I'm currently using Musical Fidelity M6PRE/M6PRX with B&W 804 Diamonds and really, really like the sound. The Musical Fidelity M6i (200w/ch), a lower priced integrated version of the separates that I have, lists new at $2999 but can be had used for much less. There's also the M3i integrated (76w/ch) which lists new for $1500.
To my ears, NAD with B&W leans to the warm side of neutral whereas Musical Fidelity leans to the analytic side of neutral though certainly not harsh.
In the tube arena, you might want to consider the Rogue Cronos Magnum 90w/ch, but it may be a bit above your budget. I see there's a used one listed on Audiogon for $1699.