My number one pick for westerns is "The Outlaw Josey Wales."
It's also my number one pick for best movie ever.
Really, you can't go wrong with any westerns staring Clint Eastwood.
Sergio Leone is an awesome director, and "The Good, The Bad, and The Ugly" is definatly on my top 10 list for all movies.
Be sure to also check out "Unforgiven" if you haven't seen it.
I wasn't a big fan of "The Wild Bunch", I mean, it was decent, but it just didn't hold my interest so well.
The Magnificent seven is an awesome flick though.