Amp for Mirage M1 Si's??

I had a pair of M3si and tried all kinds of "Audiophile" class A AB amps. I got a pair of class D monoblocks, and it was like I was standing in the room vs standing in the next room. The sound completely opened up, and the bass was some much better. They are the way to go with the older Mirages.

I recently brought my M-1's out of storage and paired them with Parasound Halo JC-1 monoblocks (400 wpc.) They have never sound better! I was very impressed. A bit over your budget, but goes to show what can be achieved.

Thanks every one that's what I'm looking for! So maybe
a Spectron or Parasound might work. Any thoughts on how
Krell might work?
I have been playing with and getting some positive results
with just swapping PC's. Also I initially had them to
far apart for my listening position. Just 1/2 inch in
both ways really locked in the solid wall of sound.
Any thoughts on spiking them?? I did not get any with
them but wonder what effect they may have on the bass?
Anyway thanks for the advise and keep suggestions coming!
Looks like I will have to try & raise my budget somewhat.

Spikes make a major improvement! A necessity IMHO!

Brand new--they came w/spikes---Don't expect much in bass definition w/o spikes.--Get U some.
As I remember from the manual their setup instructions were "spot-on"--Something like 3 to 3 and 1/2 feet back and sides for unbelievable imaging.--Of course that was for the 3si's---I would also at least try the short wall. My short wall is wider than your 12;wide. Mine is 14.6 wide and that worked well.---(That rear tweet loves proper reflection.)