As far as raw blasting power, Surfer probably beats Hal by a smidge or two. I also think he has a leg up in the matter manipulation department. Surfer also has a big advantage in reaction times. And since Hal's constructs can be absorbed pretty easily (solid light, EM spectrum, yadda yadda) Surfer definitely has the tactic of absorb and counter, where Hal absorbing blasts of Power Cosmic is highly debatable at best.
And as to energy siphoning, Parallax is a billion times more powerful than Hal as a GL. And Doom is well... Doom. Stealing power is what he does.
Oh, and as to redirecting energy, Quasar pulled the same thing. Didn't phase Surfer in the least. He doesn't typically use enough power in each blast to actually hurt him...