Contrast/compare 50W tube amps

of your list, quicksilvers are the ones with the magic. check cj, mac, arc, vac, and music reference as well, if a tube amp or amps is your destination.

Have you considered the AES Sixpac amps? They are made by Cary, are very nice, and IMO are a bargain. For a few dollars more you can have Cary upgrade the speaker binding posts, add a balanced input, and install upgraded caps. You can change the KT-88 tubes for KT-66's if you like a warmer sound. They are 50wpc with KT-88 tubes. Here are a couple of reviews:

http://www.positive-feedback.com/Issue6/sixpac.htm
http://www.soundstage.com/revequip/aes_sixpacs.htm

BTW I have no affiliation with Cary or AES; I just really like the amps.

I have some issues with the Cary gear,would rather consider the VAC Renaissanceor PHI series.
Same for the ARC and CJ,both have an identifiable signature on the music.Sorry -don't wish to offend!
Thanks for the observations.The GM-70 and Quickies are moving to the Front-of-the-Pack.
No further comment on the Atma-Shere/OTL route??

Many would be quite happy with the DeHavillands. But I could not get them to drive with the energy of the Quickies.

Tpsonic, any reason the Conrad Johnson MV60 (55 watts/ch with EL34 tubes) or MV60SE (60 watts/ch with 6550 outputs) aren't on your list?

I have the MV60 and find it very musical with more than adequate power. (I listen to a wide range of music, though 95 dB average is the high end of my volume range. 80 to 85 dB is a more typical volume and the amp powers my 87 dB/watt Spendor S5e's just fine to the highest volumes I listen at.) The 6550 MV60SE might be the better choice for the top & bottom end, but there is certainly no substitute for the magic of EL34's in the midrange.