The Belles Aria integrated can be found used for around $1300. It sounds very sweet. Beautiful sounding little amp. It supposedly has a decent phone pre as well. I’d pair it with a streamer (maybe bluesound node) and a good dac (budget $800-$1000 for the dac.
I had a Belles Aria and loved it. I now have a Kinki EX-M1, which I love as well.
Another option that I recommend often is a pair of LS50 wireless 2 (meta version) and a pair of matching Rel subs. For around $5k its hard to beat