Best Speakers for Symphonic Line electronics

Hi Turek -- I'm pretty familiar with the K250. In the absence of info on personal tastes, I can only offer general comments. So here goes:
The 250 can drive practically anything and I've rarely (if ever) felt there was a "mismatch" with the different brands of speakers I've heard driven by it. If anything, it was just the inherent "musical character" of the speaker coming out; one either liked the speaker in question, or didn't...
So it all boils down to:
a) the volume limits imposed by your room size and treatment...
b) yr tastes in reproduced sound, i.e. which speakers reproduce what you cannot do without and compromise where you don't really mind!

OTOH, I find (you're the better judge, however) the tube pre a bit on the warm side, stronger in the mid (& upper mid) region So, maybe, speakers that are generally termed as very "flat", "a bit on the dry side", etc, could also apply.

BTW, SL make their own speakers; 1-2 models sound beautiful (but they are expensive)!

Hi Turek -- I'm far from biz connections with the audio manufacturers! I met Mr Gemein of SL, talked about jazz & Brahms, tried his equip & liked the sound.
I also have a pair of RG & Kraft mono's at home. (I also have other amps -- this is a disclaimer)
As to speakers:
I admire the Vandies for their "correctness", but I'm not enamoured by the overall sonic result. It's a matter of taste, really.
For me, the Soundlabs are another matter. The big ones are magical (but don't drive them TOO loud with a 250 -- the 250 outputs lots of voltage when asked for, it could damage the speakers). The Belcanto are not that far removed, soundwise, from the Soundlabs. They have more dynamics, while the Soundlabs have better nuances, reminiscent of a "full-range" Quad.

You noticed my preference for stats. Take what I say with a grain of salt. Your 250 will drive them anyway, so it's up to your ears. Cheers

Bombay I hadn't noticed you got a CAT for your RG4's! That's a magical combo -- K.S. MUST have used SL to voice his pre... Good show and, please, forget "upgrades"!!

In re, speakers, my most exalting experience with dynamic speakers, was with a pair of Audio Artistry Beethoven Grands driven by 250. For anyone with the skills to diy them (very difficult) or the money to buy them ($+20k?)...