Out of the box, MB 550s will do the job. The less you spend in original purchase is money/time you will spend modifying them before they will be the traps you want. I have used duke #3s for yotes here in Wy and had excellent luck with them, but I spent lots of time tinkering with them, and replacing/ adding parts to toughen them up to the standard I wanted. Heavier chain, etc.
I have gotten out of big trapping of coyotes, to much time worrying over cows, which has turned into wolf trapping.
Wolf trapping is a different ball game, gear wise, from yodel dogs. I pulled the pin and ordered MB 750s at $370 a dozen, time is money and $800 calves aren't wolf chow.