Amp advice for Avantegarde HELP

Hi guy's,

I am entering new and unchartered territory and need some real help. I had been running high powered tube amps into panels (see system) but have recently decided to try the high efficiency side of life. I had really good ideas about what worked well with my Logans but am quite a newbe on the horn thing.

At the moment I have a pair of Avantgarde Duo 2.2's upgraded with Cardas internal wiring in my room. I am using my Aesthetix Callisto signature (which seems to work very well) as a pre into a pair of Nagra VPA's. The Nagra's sound really good but are a little too noisy. I don't think I need 50 watts either. In addition, the gain structure of my system is messed up; I can only crack my preamp volume open about 3-4 notches (for full volume).

Help me with some good choices for amplifiers in the 3-4k used range? I am thinking low wattage SET is probably the way to go but don't really know the differing characteristics between 300B, 845, PX25, etc. I have always run my system balanced; are there any good sounding amps out there that fit the low power mold and are a balanced design? I obviously need something that is quiet. Also, I am not sure about what to look for to correct the gain structure (lower gain amps?, but what numbers?).

Some items on my radar right now are Wavelength Cardinal, Dehavilland 845, Art Audio Diavalo (sp?). Are these good choices? (BTW, I really like the looks/design of the Dehavilland).

Thanks for your help in advance everyone.

The cost for a used Art Audio PX-25 should be within the ball park. The s/n ratio, the quietness is astounding, as is the fidelity. Rumored to be Art Audio's finest amp. The quietest amp I've ever hear. Perfect on my Duos. With this amp, you can hear every scrap of music as songs fade out into blackness at the end of a cut. Hearing into the music in that manner really adds to the realism of your listening experience. (Lacking this level of quietness, most other amps/systems cannot capture this low level content.) Note, that your preamp, if it is super sensitive, may be contributing to the inablity to turn up the volume.

You'd be surprised that in many cases, AG's do like power. Though the "little" PX-25 works exceptionally well, able to provide both micro and macro dynamics. And they can boogie too.
There is an Air Tight 300B amp for sale right now for $4000. It would be a superb match. I have owned AG's for awhile and used them with Sun Audio 2A3, Fi Super X with 2A3 or 45's, Welborne Apollo's, and now Audio NOte Neiro. You really should go the single ended route.
I had a pair of Uno's. Tried many tube amps. Finally settled on a Pass Aleph 3. I know it sounds crazy, but it sounded incredible.
Thanks for all of the input so far. I am wondering, can anyone share experience on the sonic traits of various power tubes? 300B vs. 845 vs. 2a3 etc.? Or, is there more in the design of the amplifier than the tube per se?

Forgot to mention per the Art Audio PX-25s. They are available either with a low voltage input or the std input. For your AGs, you want the low voltage input option.