If you're set on getting a gas grill spend the money and get a Weber Genesis. Yes they are spendy but light up every time and last forever. If you're thinking that maybe you might want to try smoking meat start researching pellet grills. They have a timer and you don't have to babysit them and they get good results. Rec Tec like treeman mentioned is a good one.
I have the Weber Spirit II which is a step down from the Genesis. In hindsight I should have gotten the Genesis but the Spirit II is still a fine propane grill for what the OP is asking for. And if you remove that back rack it will smoke big pieces of meat too. Makes a mess in the bottom, so there are many steps involved in using it as a smoker without turning it into a tire fire, but I can attest that it can be done.