Bought the Westinghouse ePX3500 to replace a 20-yr old gas powered machine that was louder than a jet engine. Didn't need to wear any noise-cancelling headphones - this machine runs fairly quiet. The 2500psi peak pressure is enough to clean a Trex-deck, wash off a pool lanai and sun-cover, and probably (but haven't yet..) clean the cement-board siding. My wife gets to do most of the power-washing and now it's become one of her favorite machines! I'd recommend this machine over any of the others. It's actually rather tiny, lightweight, doesn't tip over, and has a lengthy electrical cord with a long water-pressure hose.