I bought my Jolida 302CRC for $600 a few months ago. It’s pushing some 150lb speakers and manhandles them up to 90db or so. Tons of texture and tone and just great sounding. For under a grand I would look at Jolida if your into tubes.
I have a Musical Fidelity A1008 (a 6k integrated from 15 years ago) for just over you budget on the way.