I used to have a problem breaking strings all the time and that lead to try just about everystring out there for a while. I finally ended up with the Dean Markley Blues Steels (9-42's), and I've not looked back.........that was about 15 years ago..
They also retain their clarity or "newness" if you will alot longer than normal strings.
I've actually turned the other two guitarist in my band on to them and they love them as well (Both strat players)
FWIW
Rick