I dont own exs, but I´m sure it will convert well, since akai is a well known, commonly used format. However, I do use Kontakt (2) and I think I´ve never had any problems importing akai cdroms, for the same reason. The reason I choose to invest in Kontakt is because it seemed more powerful, with scripting etc.
I think I´ve seen you on another forum (it´s virtual) and I suggest you ask about the scripting universe in their kontakt forum. Experts like Kotori, Big-Bob, Thonex and more can invite you to the mysteries of Kontakt-scripts.
For me, Nils Libergs equal power crossfade script is really an awsome reason to use kontakt scripts.