Budget amp that will give Magnepan 3.6Rs better depth of soundstage

I’ve had Maggies for years and I have found after trying a few different amps that if you can utilize or locate a true class A older Bedini amp, you will have phenomenal full natural sound with great warmth, exceptional clean highs and excellent separation. I use a Bedini 125 watt per channel amp  now. Just a thought. 

If you are in the Ohio area I do have a recapped Adcom 555 mk2 For sale

Your room will work. Pull them out 5 feet, tweeters in. But you'll need a real amp, Parasound A21 is my budget recommendation. Second choice would be the Adcom 555.

Give nice Class D a try? You can get a Hypex NC502MP based amp new for that much. It's 500 watts which your Maggies will enjoy, especially for transient peaks. Suggested brands would be VTV and Audiophonics. I use a March P502 with my MMGs, and they've never been driven so well before for me. Incredible clarity, detail and drive. With Magna Risers, my MMGs have supplanted my Vandersteen 2ce Sigs as my faves. 

Mine are actively biamped with a Marchand crossover and a Classe CA-200 (treble, mid) and a Nakamichi PA7.  Active biamping is really the way to use budget amps; Maggies are very easy because of the external crossovers.

Look for an amp that doubles watts from 8 to 4 ohms.  That means good high current.  Don’t listen to anyone who suggests bridging an amp into your Maggies.  Not a great idea with most amps to bridge into 4 ohms.

budget amps used with decent success on my Maggies:

Krell KAV 250a - doubles into 4 ohms and stays cool

Parasound A21 - also muscular 

Levinson 23

i also love the Proceed HPA2 as suggested above.  

Maggies are incredibly sensitive to placement and toe in angle.