The coil ones are less likely to get tangled in your reels when you're fighting a fish or just simply retrieving an iron. They are easy to store and don't tangle as easy. I would certainly suggest those.
As far as the paddle goes, I would suggest getting the Manta Ray over the String ray.
It has a wider blade with more Surface area. It weighs almost exactly the same and the price point is the same.
The rule of thumb when choosing a paddle is you want to match the kayak in width.
"many recreational kayaks are so wide that they need a little extra "oomph" in the paddle to make them perform well—especially when accelerating from a dead stop. "
http://www.roguepaddler.com/choose2.htm
AB Sting Ray Specs
Blade Surface Area:
87 sq.in.
Paddle Weight:
28.75 oz
AB Manta Ray Specs
Blade Surface Area:
104 sq.in.
Paddle Weight
29.5 oz
If I remember, you got an X-Factor? 33inches is a nice WIDE boat. You will definitely notice a difference.
Good luck, see you out there.
Neill