The grill has an easy to recognize appearance - it is round in shape and rests on a three-legged cart. It comes in several different sizes, but the ideal choice is the 22.5" model. This size has tons of room for grilling - you can even fit two whole chickens on it. It's got a lid with lots room so you can fit big tri-tip steaks in there. There's also an optional attachment that acts as a rotisserie. If you're going to use convection heating, you'll need a pair of charcoal briquet holders. These come included with the Weber Kettle platinum grill, but are inexpensive if you want to buy them separately.
The Weber Kettle comes in several different models - the Silver, Gold, and Platinum. As the different models become more expensive, they have more features. The Silver is the cheapest of the three. It's a solid workhorse grill that will last for a very long time - some users have had their Silver for over a decade. The only issue with the Silver is that the ash-catch pan is a bit lacking. If you are cooking on a day with a lot of wind, ash can miss the pan.
The Silver also does not have another benefit that the Weber kettle Gold possesses - a hinged cooking grate. This grill with hinged openings is very helpful for roasts that take a long time, because you can add more coals or rearrange the current coals. So you might want to look at the Gold model if that's an important feature. However, you can actually buy this hinged grate separately and just place it in the Silver. It's called the Weber 70915 Replacement Hinged Cooking Grate.
The Gold model replaces the ash-catch pan of the Silver with a ash-catch can that fits closely to the underside of the kettle grill. This is very effective at removing all the ash, and you can discard the ash without getting your hands dirty. That's a big plus of the Gold over the Silver model.
If price is no issue for the best barbecue grill, then you should go with the Weber One Touch Platinum kettle grill. This has all the features of the Gold, plus two worktables and a more rugged cart. The worktables have some hooks on them to attach your grilling utensils. The Platinum model can be bought in quite a few different colors, and it also comes standard with a pair of charcoal holders. These extra features add up to make it the top model of the Weber kettle grills.
These three grills are all great choices for either the neophyte or the expert barbecue enthusiast. Before you decide which one is best, look around for more reviews of Weber kettle grills. They're a great choice for folks who like to grill with charcoal.