I debated the same thing before my build. The pressure system just seemed so much easier to start with. But then again, I dont burn that many gallons per year. Havent had any trouble with mine. There is some cleaning involved when burning the dirty stuff, but that is probably going to happen with either style. In the long run, siphon may be more reliable, but I didnt want to go through all the steps with the compressed air. The siphon guys can probably list other pros with that type of system.