I'm in Colorado as well and earlier this year changed over to the Michelin Pilot Sport A/S 3 Plus.
I have been very happy with the performance of these (this has included a track day) and I expect you would be quite happy with them on your canyon drives. The ride softness is a night and day difference between these and the Eagle run-flats I had before.
I would go to Discount Tire to get them and spring for their tire coverage. I can't tell you how much money that has saved us for tires with premature wear.
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