If you are just going to use keyboard in studio,I think T3 , T4 and Pa3x are just waste of your money.Get S910,or Pa500 ro try new Roland bk5 or bk7m modul.They both got great styles .Maybe even close to big t4 or pa3x .

But,I still think all of the above are overkil for studio.If you want it for studio get livestyler 14 and you can play Yamaha styles.