2012 Western Genre Challenge

So 2011 was my first year of participating in single year challenges. I felt like I stuck pretty close to what I was familiar with. But for 2012, I want to experience some new and not so familiar genres. So I'm signing up for The Lost Entwife's Western Genre Challenge. I wouldn't consider myself a Western genre reader so I'm stepping into unfamiliar territory.
I'm going for the Lick and A Promise level (10 books). I didn't have to make a master list but I wanted to give myself a list in case I needed help remembering what to read :)

My Antonia-Willa Cathers

The Quick and The Dead-Louis L’Amour

Lonesome Dove-Larry McMurty

True Grit-Charles Portis

Cherish by Catherine Anderson

Texas Destiny-Lorraine Heath

The Enchantment-Kristin Hannah

All The Pretty Horses by Cormac McCarthy

No Country for Old Men by Cormac McCarthy

Lawless by Ed Gorman

I only added one book on my Fill In The Gaps list (All The Pretty Horses). Plus I put a few Western romances in there. Any can't miss Westerns I should add to my list?