Best Solid State Amp for Vandersteen Model 2 Speakers?

Hello Everyone! Can you please offer some insights?

I have Vandersteen Model 2CE speakers and I am upgrading to my *last* amplifier. Can you please share your experience in matching *high end* solid state amps with Vandersteen Model 2 speakers?

For context:

• I now use a NAD 218 THX amp, so the new amp must substantially outperform this amp
• I am good with either Class AB or Class D (switching) amps. (I cannot accommodate the heat of Class A amps)
• In order to fit my audio stand, the amp must be no more than18 inches wide, 19 inches deep, and 16 inches high. (These measurements disqualify Pass, Bryston, and BAT amps)
• I can go with mono-blocks or a stereo amp
• I am looking for something that gets me to the Levinson, Ayre, Boulder, and Rowland level of performance
• My budget is $3.5K (new or used)

Thank you for your thoughts!