Dynamics and Microdynamics

The Wilsons, in their earlier incarnations, leaned (no pun intended) from thin sounding (Series 1), to richer sounding (Series 2) to lean again (Series 3). Depending on which incarnation you are using, this may be helpful information.
I don't believe that Dave ever used components that sounded "lightweight" as did older Classe equipment (I don't know about current lines; haven't heard them). He always went for a "rich" sound, as in Rowland Research, which assisted in his "voicing" of the very earlier WATTS.
As for the WATTS not having "macro" dynamics, all I can say is Dave must have radically changed the speakers over time. When I had them, I used them with VTL 300s, and, believe me, they had not just macro, but MACRO!!!!! In fact, I might have said, at the time, there were fewer microdynamics than macros.
Someone else suggested the front end would be important and I agree with that wholeheartedly.
And as for "warmth" hiding detail, well...hmmm...not sure I'd agree with that. Just listen to a pair of Avalon Ascents or Eclipse speakers, which have a very natural warmth to them, and they always had terrific ability to convey details. Not to mention their sense of space, which was, on Jadis electronics, Heaven on Earth. I don't think it matters if a sound is warm, unless that warmth is an overabundance of upper bass/lower midrange frequencies. Music needn't sound sterile to convey detail.

I have heard the 390, 380, and transparent cables together, the Classe (flagship monoblocks and CAM350) and B&W together, but not the Wilson Audio and VTL. I believe what you heard was mainly the effects of the amp. Classe amps tend not to be the warmest nor the champs at macrodynamics (in its price range). I do remember them revealing spatial details very well though.

Some people run the 7s with low power tubes so I would think 100W is more than sufficient, although having never heard the Wilsons I can't be sure. You can look into Manley amps as well. I think they combine refinement, warmth, and tube power for their price very well. I don't think they're as good as the Lamms but you do have to pay more. It certainly gives you a different combination of sonic attributes nonetheless.

I'm not sure 100 watts is enough. Both Wilson and B&W Nautilus speakers have lowish impedance curves in the 30-80 hz range, and both are rated at 90 db efficiency (or thereabouts). Any source material with wide dynamic swings from ppp to fff will have problems with these speakers (if the amp can only put out 100 watts RMS or less).

Thanks for your insights. I agree Classe is a little on the cool side. Perhaps their Omega line is "fuller" sounding, but I haven't heard it.