Matt,
Del Lago is a Nugent design, not Kavanaugh. I played there before the housing was built and thought it was a quality course and would compare favorably to many in the PHX area. Now, with the housing, I wouldn't know.
I generally don't like " Best Lists" when public and private courses are both included. Strange as it may seem, I haven't played that many privates in AZ. Of the ones that I have played, Desert Forest is at the top. I have not played Forest Highlands. I have played Blackstone, Mirabel, Briarwood,Ancala, Terravita,Seven Canyons,Desert Mountain Geronimo and Renegade,Silverleaf, The Gallery North,Tonto Verde(both courses) and Quintero(where my wife had a hole in one.)
As far as the publics are concerned, if you choose to bifurcate them by "value" that's ok. I've played a lot of publics and any "Best List" should include Papago in anticipation of its reopening in December after renovation.