OT: home stereo speakers advice

[Tz779]

hi PLers,
I am not a hi-fi expert.

The Pioneer speakers i got at the dump died. They screech when i adjust the volume. It happens on both receivers I have, so I am betting on the speakers.

I am considering Polk TSi300s, or JBL A170s, both $360/pr + $36 tax, free shipping.

OR: local advert for KEF C85s for $300. I think these are about ten years old? I am thinking they are better speakers, and save $100, but is this false economy?

Robin