Okay....so I have never owned a grill or smoker, and I have no idea what how to grill.  The most I've done is hot dogs and marshmallows over a campfire.  We put in a new patio and I'm ready to take the jump and learn.  I've been looking at a 
combo grill/smoker from Lowe's.  Anyone have experience with these?  It has good reviews, although some mentioned rusting on the doors.  I'm open to other suggestions.  I have about $500 to spend, and I'm a beginner, so I don't want to get into the fancy ones.  I want to learn what I need to do and then look into something better down the road.
I've been reading through parts of the thread, and there's some great recipies I want to try.  I figured if I'm going to learn how to grill, I might as well learn how to use a smoker as well.