Upgrading form Pass integrated amplifier to a better one


Hello,

Currently I have a PASS INT-250 integrated amplifier . The Pass INT-250 is a very good integrated (in my system it was overall better than Plinius Hiato, Gamut D150se, Mark Levinson 535, Vitus RI-100,  Accuphase E-470 and some others) but I can't get rid of the feeling that I miss some explosiveness (drum kicks for example) and micro details.

I know that its not the speakers. The new Sonus faber tradition I have are much more open, dynamic and airy than previous Guarneri Evos, Elipasas SE and Amati Anniversarious I used to own. And before buying them I auditioned the Serafinos with Audio Research separates and it was the amazing combo. But I really prefer not to go the separates road ( ICs, power cords and space contribute to financial constrains also) and even so I like the combo of Pass and Serafinos overall but from time to time looking for some better integrated on the market.

Currently I presented with a good opportunity to buy latest Gryphon Diablo 300 integrated or latest just released Accuphase E-650.  No possiblilty to demo them, so I am asking here on the forum if anybody can comment if Gryphon Diablo 300 or Accuphase E-650 will be better integrated than Pass INT250 overall and especially in terms of dynamics, micro details and harmonics.

Any advise and opinion would be very appreciated.

My system: Esoteric K-05x, Pass INT-250, Sonus Faber Serafinos, all cabling are the Shunyata Sigmas.

Room is 12" wide by 17" long. Listen mostly acoustic jazz and chamber classical on low to moderate levels.


Thank you.


denon1
"Don’t tow your bass boat with your Ferrari." 
This is precisely my point.  Pass has everything from high powered to low powered amps.  They provide the goods without trying to sell any snake oil.  I don't see any innovation in the boutique brands.  They are the ones, in fact, that are trying to tow a bass boat with a Ferrari.  
“I don’t see any innovation in the boutique brands.”

Linear Tube Audio, MSB, Aqua, Lampizator, Schiit, Nagra, Innuos, Total Dac, Roon....I guess it depends on your definition of innovation or your definition of boutique brand.
denon1, thanks for the update. Very interesting...
And some people say that cabling doesn't make a difference, we know better.
Lak, yes, my personal opinion that cables should be considered as components. Cables synergy with gear is very important. 
I wish I would realized it much sooner in my journey. I sold/traded quite a few great amplifiers because of the poorly matched cables. Btw the pass int-250 sounds terrific at low volumes, probably the class A bias at lower volumes plays some part. I would strongly consider class A pass separates (pass 100.8 or even better 160.8) , but they generate a lot of heat.
denon1
Much Thanks! for the update. Good to read that you solved the Cabling issue.  Now, kick back and enjoy the Music!
Happy Listening!