any trouble with fret buzz will come from a poor setup, not your strings.
Elixirs, DR tite fits, D'Addarios, Ernie Balls have all worked out great for me with no issues.
the only strings i've ever had problems with were WebStrings. i guess i expected it considering the price. but i tried 2 different sets and both were just horrible. now matter how many times i stretched them, they would never seem to settle. had a hell of a time getting them in tune and intonated properly. WebStrings =
