I use D'Addario's that are 10-52 which I think are basically 10 on the treble and 11 on the bass. I like the extra chunkyness when doing rythm stuff and the slightly brighter 10's accompany the chunky 11's very nicely. I also tune down 1/2 to a whole step so 9's just aren't very practicle for me. Plus I played the acoustic a long time before moving to an electric so that's another reason I use heavier strings. 9's feel too brittle and sound too thin to me.