New Amp Advice

I'm considering replacing my amp in what I hope will be the last major upgrade for a long while. My current system is Roon Nucleus, dcs Bartok, Octave Jubilee preamp, Michi S5 amp, Sonus Faber Il Cremonese speakers, Audioquest Niagra 3000 power conditioner, Nordost Heimdall 2 cables, Clearaudio DC performance TT with Ortofon Cadenza bronze cart, Simaudio 610 LP phono stage. Room has been treated and is approximately app. 21x30. About 80% streaming from Qobuz or Tidal-the rest vinyl.

I like the performance of my system and spend at least a few hours every night listening. Made the very wise decision a few years ago to replace all the time I spent watching cable news with music. Varied taste in music-jazz, blues, R&B, country, old time rock, no rap, electronic and very little classical.

Logically, the Michi is the weak link but I think it performs at a very high level for its price, is extremely well built, and has plenty of power. Hard to describe specific improvements I'm looking for, maybe wider soundstage and better imaging.

I prefer to buy new and prefer hybrid or SS-ambivalent about the tube sound and, honestly, intimidated by the potential maintenance issues-I'm old and inept. My budget is approximately up to 40-45k, maybe a bit more or less depending on how smitten I am, but obviously happy to spend less. Exploring possibilities but only willing to make the investment if it produces a significant improvement. I've heard a couple of Macs-prefer what I have now-and the new Simaudio North 761-I like Sim products but honestly couldn't hear a significant improvement in my system.

I know I need to audition potential replacements so just trying to get a reasonable list of candidates. So far, considering Accuphase A-300, Audionet Maxx (intrigued by the soon to be released Schrodinger) Boulder 1161 (probably should wait for the new 1162 or 1163), Burmester 216, Bricasti M32, T+A 3000HV, Constellation Revelation Series 2 and Dan D'Ag s250-its a long list I need to narrow. The Dan, Constellation, Boulder and T+A are available at dealers within an hour or two-the others I'd have to travel to hear. Looking for a relatively neutral sound, I suppose, but sometimes I think, to paraphrase what Justice Potter Stewart said about pornography, you know it (the sound) when you hear it.  This will be my last shot for a long while, that's what my financial advisor says, so I need to hit the target. 

A long intro, but trying to anticipate questions any of you might raise. Thanks in advance for your thoughts- I respect the enormous wealth of knowledge on this forum.