Amp upgrade for Aerial Acoustics 10T's? (<$1K)

I recently picked up a very nice pair of Aerial Acoustics 10T v2’s to replace my ADS L1530’s. I love the AA’s for a number of reasons, but I’m worried they might be a bit too demanding for my amp. My current amp is a vintage GAS Ampzilla that’s had Mike Bettinger’s reference restoration with JFET input mods. It’s rated at 200wpc, but I’m not sure it has the current necessary to drive the AA’s through demanding, bass-heavy passages.

I rarely listen loudly, but when I have, I’ve noticed the amp’s power meters dimming on the heavy bass notes. The meters only indicate ~100wpc, but I don’t place any confidence in their calibration or accuracy. The amp also loses its composed and detailed presentation at these listening levels. I think it’s trying to tell me it’s being pushed a little too hard, and the last thing I want to do is damage the speakers or the amp.

So that brings me to the topic of this thread; can I find a suitable replacement amp for less than $1k? From what I understand, the AA’s really shine when driven by a high wattage, high current amp. I’ve been looking around for used alternatives and have found a few that may, or may not have potential.

Threshold S/300 ($900)
Nakamichi PA-7 ($890-975)
Bryston 4B-ST ($999-1150)
Perreaux PMF 3150 ($995)
Aragon 8008BB ($1175...yikes, easy to get over budget)

What do you guys think? What other amps would you recommend?