One person's budget gear could be someone else's holy grail gear so some specificity would be helpful. That said, I think a pair of Mark Levinson No. 536 monos should be on the short list. Not sure those larger Vincent monos are available stateside but they should be awesome. I have one of their stereo hybrid amps (150wpc/300wpc) and I really love it. Have put it up against several more expensive (and more powerful) amps in my system and it held its own and in some cases even better. Very underrated brand here in US.
Amplification for Wilson Audio Sasha on the cheap
What have you been driving your Sasha with and getting that low controlled huge bass.