Audio Note Oto SE.
Look for a second hand one. It's a single ended pentode. If you find a SE Signature, get it! Jackpot. Look for one with 4 knobs, the ones with 5 knobs are quite old now.
If you want to buy new, Audio Note has had a price increase on 1st July, before that I enquired and the new price for a Signature was £4700 rising to around £5500 now. You can find a nice second hand SE for around £2000, if you're lucky you'll find a Signature at £2,500-3500. The holy grail is the Silver Signature if you want to spend thousands more (and if you can ever find one!)
It's a 10W valve amp. I have never needed to push the volume past 50% in my small-medium room. Yes high-efficiency speakers are a good idea, but before my Audio Note speakers I've used it with ProAc D2Rs and Harbeth P3ESRs no problem.
The sound is absolutely gorgeous, whilst still retaining clarity. EL84 valves. I have owned a Sugden A21SE Signature, and while I had a lot of respect for what it did, I couldn't love it. I love the Oto SE and the SE Signature. I also have a couple of pre/power combinations (Croft/Primaluna/Audio Research) but always want to listen to the Oto.
No remote control, but I use Lumin U2 mini streamer with Leedh processing for changing the volume when the cat's on the sofa with me.