If you have a bit of skill 6'1" should be fine. Good question about the PNator. It seems to me that there is a lot of crossover between them. I second Rusty's opinion though. Absolutely fabulous board. See if you notice this: when I was looking for a new board, I watched every Nev video there was on the different boards in the Firewire range. Now, his job is to speak highly of his own products, but when he introduces the El Fuego as "the world's best surfboard" there is a real sincerity in his tone of voice. He really means it.
I think an El Fuego/Hellrazor combo would be an outstanding quiver (throw in an SP or BP for the micro small days, as in below thigh high).