FASS DDRP doesnt give you much more fuel pressure than the stock lift pump. I would go with the air dog if you can. I got the DDRP just because money was tight at the time.

so far AI have six months/15k on a pensacola pump and airdog, with no problems from them. just not too impressed with the injectors($217 / set what did I expect?). the Airdog is warrantied directly from airdog, not pensacola.