I have LA Scoring Strings and it's fantastic, but I'm surprised that no one has suggested EastWest/Quantum Leap Hollywood Strings. The library is fantastic! I would recommend getting the complete composers collection that East West is offering right now. It's half price because of the anniversary sale. Actually all of their software is 50% off right now. The great thing about the composers collection is that you get 7 of their products, and they're all great! Make sure that you have enough hard drive space (at least 500 gigs) and plenty of ram (nothing under 6 gigs).
