I have a 16" centered composite deck, trex's premium product that I installed. It's great. It's hot when the sun is on it but by 2:30 pm or so, our deck is out of the sun and you can walk on it barefoot. I've got a cooking station sitting on it with concrete countertops and a primo, I'm guessing 600+ lbs. No sag.

Our sealed x2 wood deck had boards rotting after 8 years. I'm not sure I'll ever have a wood deck again.

Having said all that, you could get board feet of wood deck for 1/3 to 1/4 what that trex product costs. You are talking $4.00+ per linear foot. I would spend it again in a heartbeat though.