RE: Ruger Model 77 / WInchester 70 / Remington 700 (decisions.... decisions...)
The Ruger 77 MarkII would be my first choice. The only thing I would change would be the caliber. The 7mm/.284 caliber offers a greater selection in bullet weights than the .270. If you reload the sevens is the way to go.As for the trigger any competant smith can smooth them up for a nominal charge. Forget the Timney it's overpriced and requires some fitting, the only plus to the Timneyit has an adjustable sear engagement.
Good Luck