Jay and Jobie thank you for your responses. I will be using natural gas and am thinking of having a traditional outdoor kitchen setup. That is part of what is prompting this also and the PG500 does not really work well in a built-in scenario. Additionally, my PG500 is difficult to keep clean and is a bit of an eyesore on the patio. Jobie, I am surprised to hear your gas grill takes longer to get hot than the PG500.
Jay as for a rotisserie I have never used one so I had no plans for that. As far as smoke flavor on grilled foods goes, I would use the smoker for a little smoke and then move the food to the grill. Have you tasted smoked food on a PG500 or any pellet smoker vs. food from your SM-066? Did you prefer one to the other? Thanks!