That Hasty-Bake looks interesting. But what I like about the Weber kettle grill is that you can just pick the whole thing up and dump the ashes. If you want to be really clean, then hose out the kettle with a garden hose. I use one when I want to smoke ribs or a roast.
But the ease and convenience of a gas grill means that I use it 99% of the time. I got a Weber Genesis last winter, and I am really happy with it. Clean up is what I like most, but also heating it up takes literally 5 minutes at the push of a button. Also, you can control temperature VERY VERY acurately, which is essential in good cooking. When I'm done cooking, or between items, I'll spray the grill with a water mist and run a wire grill brush over the grates. This steams off the grease and cooked bits to leave a clean grill. I then spray the grill with a mist of oil, and done ready to go again. Can't be easier or faster.