Need advice on subwoofer for maggies

I’m looking for suggestions for a sub to pair with my .7 Maggie’s. I had to sell my Magnepan 2.7’s along with my Vandersteen 2q due to downsizing. Yes - I am heartbroken 😢
I purchased a pair of .7’s and need a strong sub. Amp is a Adcom 5500 - along with matching pre. They sound great but I prefer a bit more low end. Any suggestions are greatly appreciated.