Of course the B3 Hammond. The portable B3 is "obviously" portable lol and......i would say its just a cheaper alternative for the B3! Just keep in mind...to get the full effect (almost) of the 1966 B3....you're gonna need a leslie not just an ordinary keyboard amp! Same thing with the Hammond Xk-3. Me personally, I dont think the Roland Vk-8 can touch it, ALTHOUGH it does sound good.