Either way, gas or charcoal, Weber can't be beat IMHO. My wife and I received a pretty good Sears LP grill for a wedding gift, however, every season it needed burners and venturis. We eventually replaced it with a Weber LP grill. After over 7 years, all I've put into it, besides gas, is flavorizer bars. These are the bars that go under the cooking grates and above the burners. They last me about 3 seasons and cost about $35 or so to replace.
I use the grill year round at least three times a week. I opted for the cast iron cooking grates because they last longer and retain heat much better than enamaled steel. I even rigged up a smoker box for it and use it as a smoker as well.
Weber customer service is outstanding as well. When the finish began to flake off the lid, I emailed Weber about it, and rather than just send me a replacemnt panel for the lid, they sent me a completely assembled lid (handle and all)!
The burners are stainless steel and waranteed for 5 years. I've had my grill for over 7 years and the burners are just now starting to show some deterioration. Keep in mind that I also completely clean the entire grill twice a year and I'm sure that has a lot to do with it's durability.
I highly reccomend any weber product.
Les