Swap Dalis to bookshelf speakers

I have some Dali Zensor 7 (I think) floor speakers that are too big for the tiny rentals I’m in. I am looking to sell these, and buy a bookshelf-sized replacement. We absolutely love the current speakers, so I just want to make sure I’m replacing with something equivalent or an upgrade. I’m hoping to only spend up to 500ish depending on what I get for the secondhand Dalis. Any recommendations? Thanks!