If you only need room for one, might I suggest a powered kayak. I have a mokai and have been satisfies with it so far (I've had it for a year but haven't used it as much as I'd like mainly because I don't fish as much as I'd like.) I think it would handle the currents you are talking about and I can stand in it (when the current isn't screaming). You can check it out online at Mokai Manufacturing Inc.
. I must warn you though, that purist paddlers will turn there noses up at you. Good luck on your search!