Probably a Galaxy 3..I prefer the Android OS over the other.
Are there any guitar apps made for Android that a re worth purchasing? Are there any at all?
There's Maniacal's app. I've not used it, but Seanbabs has, and seems to like it. He knows his shit, so it must be ok. Plus, Maniacal's an insanely good player, so he probably knows how to put content together.