I currently ride a 2022 XRS 900 and find the power great, but it wears on you after a long day.  I think I would go with a 600R next time. I have a friend with one and it's surprising how he can keep up with the big sleds. 

Name names, who's blowing out these old stock sleds? I love my Mxz 1200, but she's a hefty gal and she goes down like a snow torpedo if I happen to catch a ski in a ditch. Can't say the thought of a 200lb lighter 2 stroke Polairs didn't cross my mind getting it unstuck today.    I saw some good deals at Byer's in Orillia and one other place.    

XCR 9R 128 for me. Like any other race born sled, it's the most fun you can have riding in the big and rough. Duct tape your hands and feet to it and it'll do the rest. lol I havent ridden Doo or Cat offerings in this category of sled but I'm sure they're all a handful if you want get loco. 

Polaris has a really good chassis and ride, but there four stroke isn't ideal.  650 would be a good choice and gets similar fuel economy to 900 ace. Yesterday, I ran in less then ideal conditions,  big drifts, lots of loose snow, used just over half a tank of gas in 140 ish kms. They are light and nimble and seem very realible.  Still some new non currents being blown out in vr1, xc chassis mostly. Maybe not what you want to hear but they are good sleds for semi to aggressive rider 

I had a 2022 MXZ600XRS 129 and I absolutely loved it everywhere EXCEPT for running the big hydro lines in Northern Ontario.     It isnt happy running much over 120km/h for any length of time.    It was so light and nimble.   If I only rode twistier trails or rode a bit slower, I would own one again in a heart beat.    If I could find a distress sale on a 600 Comp I would seriously consider buying it as a back up sled.