Based on a Daring Fireball piece, which in turn cites Coudal and Mike Royko, here’s my list of top ten Westerns, unordered. I have very conventional tastes in Westerns.

Rio Bravo
The Searchers
True Grit
Stagecoach
Fort Apache
The Magnificent Seven
The Wild Bunch
A Fistful of Dollars
For a Few Dollars More
The Good, the Bad and the Ugly

[25 July 11 update:

another list, by Gary Huswit.  As John Gruber notes, The Searchers is on everyone’s list.

Troy Smith compares Butch Cassidy and the Sundance Kid and The Wild Bunch and makes the case for the forgotten Warlock.]