Pass x250.8 vs Boulder 850 vs Spectral DMA250

Thanks for everyone contribution.
Just to be focused on my genres they are both 50% rock and jazz, not so much classical music.
Now I own a C2500 preamp because my intention was to go with a MC452 amp, and I can't exclude now the C2500 will be an intermediate solution.
@Zd542: I partially agree with you about the possible degrading of SQ using different solutions due to a couple of facts I experimented in these days: the C2500 sound quality is very high compared to some friend's SS preamps and it is (suprisingly for me) neutral, and I'm not a fan of Mc gear.
Second, a good match, in my experience, can be completely unexpected as this little class A ss amp that changed my vision, even with its limits, and convinced to me to try the solid state way without Mc output autoformers (slam, nuances, etc.)
I'm coming from a Vitus RI-100 it was a good integrated amp but not so fast and with a little roll-off on bass area.
@George, sure I will try the DMA 250 even if it not the bes coupling with a non-spectral preamp. Thanks fory your contribution about phase and angle.. yes the SF Elipsa Red needs a lot of (good) power.
@Audiolabyrinth,@Bo1972 I mentioned Boulder because in Italy the same Spectral dealer is also Boulder dealer, I know him very well so it is easier to ask him the equipment for home testing. My only concern about Pass is I don't want another Vitus, and as far as I remember they are very similar in sound presentation, but it is only memory, I need to listen them again ;-)

I will also try to listen some recent Krell stuff like the evo series, but the 402 evo is too big in depth for my shelf (take a look on my system pictures). So the 302 is the only ooption.

Any suggestion will be welcome. After my holidays I will do the auditions in my home, end of August or after September 10th. And of course I will tell you my preference best matching my actual system.

The thing is, when you audition a lot of stuff, you remember all the good things. As a perfectionist at the end you want it all.

All parts you judge an amp for, need to be exeptional. When you have done a lot of lestiening, you are able to listen to all different parts in a very short time. Most people who have this as a hobby, can often listen to a few of these parts at one time.

Beside this, audio always will be a personal matter.

Jump on Pass 250.8 ASAP!!!!

@Bo1972, you hit the point, and I'm lucky: I will have enough time to test those amplifiers, not only a day, but sure I want to:
- get emotion, the only parameter I personally consider when all other parameters are substantially correct
- be absolutely calm ! :-) very high risk of compulsive buy!

Seriously, an hi-end journalist said that a correct equipment evaluation is made on the first 3 minutes and the next 3 months.
I was asking for suggestion because coupling tube preamp and solid state amp could be very critical but I feel to follow this way, because I hear the potential of this solution.

@Ebm, thanks, an audio reason to do so without any doubt.. will be welcome.. :-)

I loved my x250.5, but my xa60.8s were in another league.

Check out the pass xa.8s