And B&K owners here?

I had an ST140 many years ago and also the EX442 Sonata, both were great amps and very tubelike.  I replaced them both for tube amps.  Scary how tubey those B&K's sound.

If replacing the ST140 for another SS amp, I'd look for Mosfets like a PS Audio Vs. getting an amp with bipolar outputs.  I think the Sonographe and cj solid state amps are very warm sounding as well.  VSP Labs were incredible amps back in the day too.  Perreaux, Tandberg, and Aragon made nice amps too but never heard them.   I did have an Acurus at one time, an 80 wpc one, was warm like the ST140 but probably not any better....Forte, Muse, and PSE are also other very musical amps as well.  

The EX442 is 200 into 8, 360 into 4 with 75 amps peak to peak, while the ST140 was only 105 wpc and 28 amps I think.  The EX442 just sounded much beefier.  I had them at 2 different times so I couldn't A/B them.  When I sold the EX442, I immediately hooked up a pair of custom Paoli M70's (60 wpc - 8417 monoblocks) and immediately remarked that it was extremely difficult to tell the two amps apart.  The EX442 Sonata is that tubey sounding.

Which is better?  I think its all about system synergy and the speakers you are using.  Both are great amps & there are many who think that the lowest powered amp in a mnfr's lineup sounds best because there are less outputs in the amp.  Many think power corrupts (I'm talking hifi here, not politics :)

Boy, give my $2500-3000, I'd put together a system that just cooks McIntosh and Yamaha

Nice.  How did you like the Sonographe TT?  I had a Rega Planar 3 for many years but always liked the looks of the Sonographe.  Also, how did you like the Sound Dynamics compared to the Vandys?

I had the Vandy 1B's a long time ago, I thought they were very pleasing sounding but not the most accurate.  I think I prefer the more accurate British 2 way monitor sound to the Vandersteens.

I'm sure your Sonographe TT would still compare very favorably to any of the budget TT's today.  I must admit, at 56, I'm still a bit stuck in the 80's when it comes to audio gear and I still believe most of the older stuff also compares very favorably with today's stuff.  More nostalgic and fun-ner to own too!

I've temporarily downsized with a small Topping TP22 into a pair of Fostex back loaded horns from Madisound https://www.madisoundspeakerstore.com/full-range-speaker-kits/fostex-p1000-bh-4-full-range-back-load...

with a small Atlantic Technology subwoofer while I'm waiting for 3 custom single ended tube amps (two 45 amps and one 3E29 amp) to be looked at by a technician.

I sold off my beloved Paisley Research AE500's as they were too large and hadn't used them in a while and my Onix OA20/2 developed a problem and I gave it to a friend to see if he can fix.  I'll then decide which tube amp I want to keep.  The Fostex's were acquired specifically as a budget speaker for the 45 amps.   

No, have no idea other than what is on the website.  If you dig a bit further, the Fostex speaker used has all its own specs on a different page.  I think they are at least 90-91 db with a very benign load.  I'm hoping they will work ok with the 45 amp I have.