A step up from the Edifier powered speakers are Fluance Ai40 $169 on sale.

If going with a mini amp:

A good deal is closeout 6.5" DCM MTX Audio TP160S-B $249 $109. Review by u/DieselWang, Video Review and DCM TP160S vs the SVS Ultra Bookshelf.

Or compact 4" Micca RB42 $149 have a great low end. Or the lower cost original 4" Micca MB42X $79.

5.25" Boston A25 $149 bogo.

DIY Kit: 5" C-Note $100. Add around $50 for supplies then budget for tools if you don't have any. Compare to built speakers costing over twice as much. Glue, clamp, solder, paint, assemble.

Single Box Dayton Audio MKBoom Portable Bluetooth Speaker Kit $129.