In search of more power ... MF? V Alstine?


I like the sound of my Opera Consonance a120 Hybrid Integrated amp (90 w), but my 87 dB speakers and large room size dictate a need for more power. Somewhere around 200-250 wpc perhaps. I was considering staying with an integrated so I could help fund my new purchase with money from selling my current one. I auditioned the Krell KAV 400xi - it was powerful and dynamic with kick-ass base like I've not heard before (too much?). BUT, not lush enough in the mid-range for me. So next up is a Musical Fidelity A5. I will audition this in a couple of days. BUT, Van Alstine Fet Valve Ultra 550 keeps creeping into my pea-sized brain. I've never heard any of his stuff, but I can't shake this nagging suspicion that it may be just what I'm looking for. However, I live in Atlanta, not in the frozen tundra a.k.a. Minnesota, so an audition seems impossible. How does the quality (sound/build) and mid-range compare between the Musical Fidelity and Van Alstine Fet Valve? And what about using my a120 pre-outs to provide the source for the 550? Or can I buy a better pre-amp than the a120 for $600 (the amount I'd likely get if I sold the a120)?
rockadanny
MF is good, but VanAlstine components have been,(in sound), way beyond their purchase price. they compete with the likes of bat, cat, cj, macjaybo and others.
Danny, I own the FetValve 550EXR. The quality of the amp is excellent. Frank van Alstine does not use solid gold binding posts, or lamb placenta chassis linings to absorb EMI. He builds well designed components without pomp, but in a very well executed fashion. You won't have to worry about poor craftsmanship with his stuff.

The sound is very excellent. My EXR is musical, dynamic, with tremendous bass authority and extension. There is not one aspect or the other that "sticks out" with the FetValve amp. Airy? Yes. Great soundtage? Yes. Liquid and organic? Yes. One thing it is not is classically tubey. If you are looking for that in the midrange you won't find it. Yes it's great in the midrange (and I've heard the Ultra is better), but Frank does not build amps that fall into the "classic" sound categories. The FetValve sounds neither like a FET nor a tube; it's better than either. The nice thing about van Alstine's gear is you can try it with a pretty generous trial period. If you don't like it you can send it back for a refund (minus shipping, of course).
Jaybo - Thanks. BAT, CJ, etc. ... if V.A.'s build quality is on par with those then I'd certainly be happy with that.

TonyPTony - Thank you for explaining the sound qualities of the 550. You described it very well.

After hearing from both of you I feel comfortable about ordering one to try out. I don't have much spare time to try numerous gear and depend on research to help me narrow the field considerably. Also, I don't have extra cash to be making mistakes. So your replies are a great help to me. Thank you again.
AVA build quality has always been ABSOLUTELY first rate. He has been in business...well I don't know...30 years? The basic principles have always been, No designer components (magic caps or whatever) or anything of that nature...just top quality components, top quality engineering and top quality build. Very straight forward.