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
Post removed 
I am the first one in fact to recommend auditioning Gryphon to anyone who can make use of it and can afford it. Any Gryphon. As I heard from many sources, there is no better solid state equipment, just different, and not many can match Gryphon's performance, especially big Gryphon's. I don't think that Swiss integrateds could match the Diablo 300' dynamics, punch and possibly clarity as well. Swiss are also overpriced, like Accuphase. 20% off for Gryphon is indeed a great deal. Optional DAC is quite expensive, though. And generally speaking, Flemming Rasmussen of Gryphon is widely respected. Gryphons are very reliable and long lasting, as far as I know.
They are now establishing the limited dealership network in the US, so anyone interested can ask the distributor, On A Higher Note. 
If I remember right, Gryphons are burnt in at the factory for 75 hours. Flemming recommends to play them for additional 100 hours before critical listening. I think, he means just that - play time not stand-by time.
Gryphon makes their own mostly or pure silver cables, these should be the first ones to try. Of course, there might be an even better match depending on taste and speakers, probably more expensive if there is one too.

Inna, let me clarify, for a Gryphon deal, I am not getting a 20% off, but instead was offered outstanding trade in price quote for my pass int-250. Gryphon don't give 20% discounts.