Good Tube Amp w/Quatros?

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Hi Ron. What's your budget?
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I just happen to have a pair of Atma-Sphere M-60s for sale, and they have the correct hi-pass filter already installed.
http://ads.audiogon.com/cgi-bin/cl.pl?ampstube&1329262165
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I hit 'Submit' too soon.

I've always loved the sounds of triodes over pentodes/tetrodes, but some prefer the latter for its punchiness. Perhaps a push/pull amp in the 100-to-150-Watt range that's switchable to triode mode? Antique Sound Lab Hurricanes? (They're 200W. monos with about 100W in triode.)

Quicksilver V4s? Monoamps again, this time 120W. Another highly mature and very good tubed poweramp, stereo this time, is the conrad-johnson premier 11A. 70WPC, ultraliner only (= no triode mode).

And lots LOVE their V'steens with ARC tubed amps, but I don't know much about them.

You also might ask your question here...
http://www.audiocircle.com/index.php?board=194.0
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Aethetix Altas hybrid amp is perfect. Right power and tone with a built in xover to perfectly mate with your speaker!

Read up on it and you will find it a perfect mate.

I've heard Audio Research sound sublime with Vandersteens.