Excal NEL Tornado or Attack Coil?

I have the 8" coil on my Excal, and am going to have the coil change mod done on it so I can swap out between the 8" and a nel coil. I am leaning toward the Tornado coil because thats already a big jump from 8" to 12x13" coil, but I know the Attack runs deeper being its 15x15". Anyways, I can always buy them both I guess at some point

If you were to go from the 8" to a NEL for the sand what would you pick?
Thanks!