I spend a week a year in Colorado in september for work, so I've been able to check out many of the favorites.
I played castle pines a few years back, and while it wasn't bad by any stretch, I didn't love it. CC of castle pines was better than expected actually. I thought Colorado GC was better than both by a bit.
My CO top 5 would be Ballyneal, CO GC, Castle Pines, Lakota, and Broadmoor East in that order. Honorable mentions would be Maroon Creek, Commonground, and Red Sky Norman. My favorite hidden gem is Four Mile Ranch...super easy but very high on the fun quotient.
Haven't played Ravenna, Sanctuary, Denver CC, or Cherry Hills as of yet, but definitely hoping/wishing to in upcoming years.
Others played in CO: Riverdale Dunes, Lakewood CC, Pradera, Snowmass, River Valley Ranch, Eagle Ranch, Wellshire, Cougar Canyon, Lost Tree, Redlands Mesa, Fossil Trace