Boating.

I just picked a 21' Freedom Commander with a 175 SHO. I like the boat, runs well but cavitates when I go to get on plane. The prop it came with is a Rubex Solais 143/17. I can get it up to 6000rpm after tilting the motor and picking up the jack plate. Just thought I'd ask for some advice on whether I should look into a cavitation plate, trim tabs or just jump right in to getting a different prop. TIA