I like matt damon, also. I'm not much of an Affleck fan

"Butch & Sundance" was possibly the first in the modern genre of buddy comedy-dramas; Films based on the chemistry and repartee between the characters more than anything else.

(You may want to include the Bob Hope-Bing Crosby "Road" films, but I don't consider them to be "modern" in the same sense, and they were pretty much played strictly for laughs anyway.)

Anyway, I don't see how Damon and Affleck could possibly, on their best days, even hope to duplicate the chemistry of Newman-Redford.