@atmasphere, you basically restated what you said earlier in this thread and it's a very sound argument.  I just don't think you are allowing for individual, subjective taste.  We've both participated in this forum for a long time.  One of the things that has been revealed to me is that not everyone has the same goal(s) in assembling/setting up their systems.  It's not even an accuracy vs. musicality schism in that there's not a solid agreement as to what those terms mean.  (There's actually a lengthy thread trying to define "what if high end".  The responses are quite varied.)  Instead our music reproduction systems are more of a reflection/projection of ourselves as audiophiles.  Just look at the variety of systems people have.  As such our systems can be technically imperfect or non-optimal, yet the listener still is very happy with the sound.  If some people want to pair Magnepans with single ended triode amps, my response is go for it and tell us how it sounds.  You want to place big Wilsons in your 12' x 12' room?  It might not be something I would do, but go ahead an give it a shot.  So while I have an opinion about matching the Technics with the Cayin, I and nobody else in this thread can truly predict whether the the OP won't like the combination.

Let's not get all boring and start agreeing on everything.

@onhwy61 I agree, however for me its really about how it can sound even better and thus be enjoyed more too. Put another way its about getting the most out of your hifi investment. 

Review Technics SB-G90 floorstanding speaker 

''So you have been able to read that this Technics is a big heavy, 3-way bass reflex speaker. So far so good. The nominal impedance is 4 Ohms and the continuous load 100 watts. 200 watts peak. That’s more than enough for many a living room. It takes about 40 watts to get it going. We estimate that a tube won’t go very well, but who knows with a heavier 300B it might work, considering the efficiency is still about 88 dB. That’s not super high, but it’s not low either.'' see review here

Mike

Based on my experience trying to match 86dB speakers with a tube amp, the size of the woofer and controlling that driver have a lot to do with whether a tube amp or SS will work better. The JBL woofers are not that large. If you can demo them, do so. But as you have not purchased the speakers, and if you can't demo them with your amp, I'd look for better synergy on paper.

I ended up with SS. You can see my set up in my profile.

As for power, in a semi-contained listing area that opens to a much larger open plan living space, I'm generally using 10 watts or less p/c and filling the space nicely. Volume range -40dB to -30dB albeit with virtually unlimited headroom.

I have a pair of Vandersteen VLR-CT bookshelf speakers which are 86dB, my least sensitive, in a 2.1 system. I have used both a Yamaha A S-2200 (90W AB) and a Peachtree Carina GaN amplifier (200W GaNFet Class D). Both perform well with these speakers. I would suggest you use  a moderately high powered SS amp