I had a septoplasty/turbinate resection in 2005 under Versed and a local. I think it helped, but it was not a dramatic improvement. But I didn't have the sinus problems you have. I will tell you that the surgery was a piece of cake, there was never any post-op pain. There were some magnificent bloody boogers, but I had no other problems. If I were you, I'd probably get it done. General anesthesia has the potential to be the problem, if the guy is not good at it. The after-effects sometimes persist for days if the hand is too heavy.