Amp s for CLS IIZs

I'm running a set of Martin Logan CLS IIZs, and am looking into an amp upgrade from a Threshold Stasis III. I tried VAC V-100s (100 WPCH) on these speakers, and the result sounds excellent, but it runs out of gas too soon, and the tube life was unacceptable. At this point, I'm looking for a set of Bryston 7B-STs - the warranty will last until I'm over 60 (past the point of beginning lunacy), but before I commit myself, are there any other low maintenance ideas? I want to do this once -

I listen to classical, jazz, newage, some folk, and old classic rock, such as Jethro Tull, Moody Blues, and Alan Parsons Project.
odyssey stratos extreme, walcott 220, pass x600
Jethro Tull on CLS's? Oh yeah! Those babies work quite nicely with kitchen prose, gutter rhymes, and diverse songs from the wood.

In additon to the recommendations by Dannylw, you might also consider InnerSound, Parasound JC-1, and Clayton (all of which I sell, along with the Wolcotts - and all of which I've found to work quite well with electrostats). The local Martin Logan dealer often sold Levinson or VTL amps to his CLS customers. I know he recommended at least a VTL 450.

Feel free to contact me via e-mail if you have any questions.

Toasting you all in penny cheer,

Innersound 800W monos if you really want to drive those suckers to the max. Those amps are a part of my system I never even THINK about changing. Effortless, delicate POWER!!!!!