In the price range you are looking at. Without going vintage which can be hit or miss. I have noticed some used Rotel amplifiers on Ebay that might work for you. The RB-1080 is nice but can be bright. Class A/B 200 wpc. at 8ohm and built like a tank. If you have a little patience I’ve seen them go for $300.
But since you said "60/40 movies with your surround system", There have been a few Rotel RMB-1575’s available at your price point. And having 6ohm ESL speakers that will drop to 4ohm’s at times I read. They might be a nice fit. Five channels "All driven", rated 250/500 wpc at 8/4ohm should give you power and detail enough. And an easy load for the amp to run. And then you could upgrade the power to your center and surrounds as well with the remaining three channels.
But since you said "60/40 movies with your surround system", There have been a few Rotel RMB-1575’s available at your price point. And having 6ohm ESL speakers that will drop to 4ohm’s at times I read. They might be a nice fit. Five channels "All driven", rated 250/500 wpc at 8/4ohm should give you power and detail enough. And an easy load for the amp to run. And then you could upgrade the power to your center and surrounds as well with the remaining three channels.

