Hi,
Listen the V-fet amps, really better than other SS, "tube like" sound, courbes similar to 300b triode.
Pass first watt SIT (2x 15 watts)
Sony ta-4650 (vintage 2x 30 watts)
I compared these two amps with my focal 907be speakers, similar sound, very natural, the sony was better with sensibility 89db.
I also compared with yamaha as-2000, much power, but no sensations, no emotion, no smile, nothing !!!
Really better than El34 PP to a friend, it's incomparable !
Now, I use the Sony with a preamp tubes (2x mullard CV4024, 2x rayton baldwin 12ax7 grey plates)
Oh my god, the sound is fabulous, very clear and transparent but no stress !
Sorry for my langage, i'm french...