Best Cheap Amps for Magneplanar Speakers

I used Ghent Audio mono amps with 3.6r and they worked wonderfully...@$1300/pr.

Nobody has mentioned Hafler?  Really?  The question is "cheap amps", right?  The Hafler DH500 is a good sounding, beefy amp and not all that hard to find.   As I write this, there's one on EBay right now, in a "Buy-it-now" for $395.  The description talks about an upgraded power supply, which certainly doesn't hurt.

On the low end, NADs are a good match, and I'll also second the Quicksilvers.

If you go tubes, the Zero Impedance autoformers might prove useful.

Adcom 555 are widely available and cheap.  New caps etc would only be a few $100.  200wpc.....

On the tube side, you can find a pr of rebuilt Dynaco MK3 for less than $1k if you are willing to take your time.  60w per monoblock of good tube power.

I drive a pair of Magnepan 1.7 loudspeakers with a Rotel RB-991 solid-state amplifier producing 200 watts/channel. They sound great! This amplifier can be found secondhand for around $700. Alternatively, the current replacement model, the RC-1582 Mk II, for $1500 new in the box.

I also have a pair of Dynaco MK III monoblocks each producing 60 watts/RMS. They provide a warm vacuum tube 'sound.' If you can solder and have a few evenings free you can build a pair of these kits produced by www.DynaKitParts.com. These are the real deal, but you have to assemble them. They cost $550 each, slightly over your $1000 budget, but at $1100 well worth the effort.

http://www.dynakitparts.com/dynakit-products/amplifier-kits/MARK-III-KIT