Yes, the twin driver does a great job all around, including various rock. I listen to everything from metal to classic rock, you name it, that little twin driver can do it. In fact, with certain rock and a Sansa Fuze as source, I might prefer it to the more expensive BA4! It's more forgiving of the flawed recordings, and has more bass kick when used with a basic player like that.
Sorry Phil, hate to divert sales of your more expensive model, but the BA2 is just that good.
Nobody has heard the BA3 (except Phil and probably some locals there) so no idea how it compares.
Apparantly the BA3 is just as good but with better lows! I'm heavily leaning towards the BA3...