benefit of Dominator over Spitfire??

agreed!!

whats a better all around board for beach break 1 to 5ft dom or spit.riding as a quad.im use to all old style surfboard shapes.havent bought a board in years stuck on my 6'10 wrv big guy shortboard

I would personally go for the Spit but the Dom will be the right choice.
Tighter arcs with the Spitfire.Lets say that the Spit is a "higher performance" dominator

I think you'd like the Dominator. Works better as a quad too in my opinion.

I find my spitfire works well as a quad and I'm riding the same set up as I had in the dominator.