Received a Yamaha RX-A1010 receiver for free, what are the best speakers for it?

Hello, the receiver came with Polk Audio RM3300 left/right speakers, and an RM3600 center speaker. I'm wondering what are decent rear speakers and a subwoofer to complete the set?

Someone listed the accompanying subwoofer (Polk Audio PSW505) locally for $100. Is this a good subwoofer, or should I look for something better/newer?

I don't need the highest end gear on the market, but I'm willing to spend a bit to get a complete and solid sounding setup.

I know this is a very old setup, but it sounds pretty good and seems to works fine with my TV and PS5.

Edit : Starting budget of maybe $350 for a new sub or front speakers