True Grit (Coen Bro.s)- I thought the acting was considerably better than the original. I also liked the attention to detail with the firearms, and most importantly for me, it stuck to the spirit of the book much better.
The Good, the Bad, and the Ugly- It's a classic, and anyone who says that final standoff isn't iconic is a lier.
Appaloosa- Well done movie, great guns, and it follows the book about as well as a film can. Whats not to like?
Lonesome Dove
Tombstone
The Proposition
Deadwood (series)- did an excellent job of showing the birth and rise of a frontier boomtown. I thought the acting was great, and the sets were superbly done. Once you realize why they use the language they did, it just works.
Lonesome Dove- it's just a classic, pure and simple.
Hell on Wheels- Currently my favorite show on Television. Not the most historically accurate, but sometimes it's okay to sacrifice a bit of accuracy in return for a good show, and the acting is great.
Open Range
As a side note, watched Tommy Lee Jones's 'The Homesman' the other day. I think it'd be a 'you like it or hate it' kind of film, but I thought it was very well done. Just my 2 cents.