Best Cheap Amps for Magneplanar Speakers

I have two options I use to feed my rebuilt 3.3rs:  (1) Krell KAV 250A for "daily" (non-focused, i.e. sitting at my desk doing other chores) listening -- also has the advantage of not putting out much heat; and (2) Rogue Audio Magnum M-120 monoblocks, for more serious listening and when I am in a tubey mood.  The monoblocks tend to heat up the room after a couple of hours.

There's a Krell for sale now.  Rogues come up every so often.  

I really enjoy both - the Krell offers a lot of control and the Rogues add a lot to the fun factor.  

Ditto the Bryston 4BST, an improvement over their original design. I’ve been driving both Martin Logan reQuests and Dahlquist DQ10’s and it hasn’t skipped a beat. I think it’s a ’dual monoblock’ design, and you can usually find ’em at about $1G if you shop around.

I own Maggie 20.1s.  I first powered them with an Accuphase P1000 SS amp.  On paper, the Accuphase was the perfect amp.  It was capable of delivering lots and lots of current, 1000 amps into a 1 ohm load!!  The Maggies are a 4-5 ohm load, and that meant about 200-250 watts to that load.  The sound was good, but not great.  Very clean, quick, but not to my ears musical.  I replaced the Accuphase with a pair of Manley Neo Classic 250s.  EL34 tubed amps at 250 watts into an 5 ohm load.  Much more musical than the Accuphase.  The music had more sole, the soundstage was very realistic.  I agree with Frogman, tubes bring out the best in Maggies.  Oh, and I wouldn't hesitate to get the 60WPC Quicksilvers unless you like ear splitting sound levels.

Buy a used Sanders stereo Mactech, it would be the best amp you could get, period.