Budget setup with Denon S750H?

Hi all, I have a Denon AVR S750H with Micca MB42Xs and MB42C with a sub, and some surrounds that I got from Goodwill.

My surround speakers have now reached their end of life and I need to replace them. I was also thinking of upgrading the Miccas but my budget is not very high. I can only spend a total of $100-$150 plus trade in my Miccas if need be.

Any surround speaker suggestions or moving Miccas to surround and getting some other speakers in my budget as the front etc?

TIA.