The A style is the only that match the ICS theme and style. B is too round, ICS UI isn't. I prefer the variant 2 =) (and really like it actually !)
The purpose is to be an ICS theme, remember that, even if some doesn't like the Holo theme (Neon is for HC actually). It should fit with Holo theme. And yes, please, if it is ICS, use the Roboto font !