Davidri,
Just to confuse things a little. I wanted more bottom end and faster pace for my guarneris and I've tried a half dozen amps and still have three. What brought my system to a whole new level was not the amp, but was the CAT Ultimate 2 preamp and the difference was not incremental. Now, any one of my three amps sounds great, so I'm having a hard time deciding which one or two to part with. You might consider trying the CAT Ultimate 2, since your existing amps are very, very fine. I am amazed at what this preamp did for my system. YMMV, IMHO, etc.. Jeff ps. With the guarneris the sound is not what I would call sterile at all. It is fast, detailed without being harsh, super transparent, has great harmonics and is very quiet.
Just to confuse things a little. I wanted more bottom end and faster pace for my guarneris and I've tried a half dozen amps and still have three. What brought my system to a whole new level was not the amp, but was the CAT Ultimate 2 preamp and the difference was not incremental. Now, any one of my three amps sounds great, so I'm having a hard time deciding which one or two to part with. You might consider trying the CAT Ultimate 2, since your existing amps are very, very fine. I am amazed at what this preamp did for my system. YMMV, IMHO, etc.. Jeff ps. With the guarneris the sound is not what I would call sterile at all. It is fast, detailed without being harsh, super transparent, has great harmonics and is very quiet.