The Antique Sound Labs AV 8s have been replaced by the AV 25 DT - a pair of monoblocks which put out 20 watts per channel (that's big for a wee tubie) more than enough to drive M3s or M22s or M60s. Check them out on the Divergent Technologies website:
http://www.divertech.com/aslwaveav20dt.htm

They're going for about $345 a pair.

G'luck!

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.