Basic Budget Bookshelf speakers

I bought a Yamaha WXA-50 amplifier for a spare bedroom.  I've got some cheap Polk Audio speakers hooked up now which sound meh. I've got some older Klipsche reference bookshelf speakers in my garage system I could swap with them but I think I'd rather get an inexpensive pair of bookshelf's and ditch the Polks.
I'm looking at the KEF Q150's and 350's as well as some low end Martin Logans. Is there anything else I should be considering?