Difficult if not impossible task at that price point I think. Maggies demand so much current and power that it will be hard to find a tube amp truly up to the task IMO...
I use a set of Cary 500 MB (SS) on my 3.6's and I think that they sound GREAT! You can get these for around $3,200 - $3,500 used. Another great SS amp is the little NAD C275BEE; hard to find used but only about $1,500 new.
Or, if you must use tube amps, I would look for a good pair of used big VTL's; something like the VTL 450 MB's...
I use a set of Cary 500 MB (SS) on my 3.6's and I think that they sound GREAT! You can get these for around $3,200 - $3,500 used. Another great SS amp is the little NAD C275BEE; hard to find used but only about $1,500 new.
Or, if you must use tube amps, I would look for a good pair of used big VTL's; something like the VTL 450 MB's...