I don't think you can go wrong with any of them. Depends on what you want,
Yamaha's stock don't compete but, if you want big HP half a** reliable then that is the way to go.
Skidoo invented the new chassie craze & their motors make good power.
Polaris has the best boondocking chassie out right now, what they lack in HP they make up for in weight.
The new Cat chassie is fine & it has the most reliable motor, so it was blowing belts last year. Ski Doo's have been doing that for years.
My theory is they all need some work out of the box just depends on how you ride & how competitive you want to be. I own all four brands so I am not biased by any means & I ride with people of all different brands. On any given day the same rider can trade marks on the same hill & all the marks will be close to the same.
The Pro is a good sled
The A/C proclimb is a good sled
The XM will be a good sled
Yamaha's with a turbo are good sleds.
They are all going to break & have problems. If you are a good rider you can make any of them do the same thing.
But, by all means keep the bantering up cause I have ne snow & need some intertainment!!!!!