Beore you buy a big grill, read this.
I got one of those super big grills, a few years ago and I love it, but I have to warn you about something. Before I bought it I asked the salesman, "what if I just want to make two lamb chops?" He said, no problem just use one or two of the rows of burners. The problem is, that if you only use a small part of the grill, the huge cavity doesn't heat up enough to sear the lamb chops. If I had it to do over again, I would get a grill that has two compartments, like my parents grill, that cost thousands less.
On the flip side, on thanksgiving, when I don't have enough room for everything in the oven, I can put the turkey on the grill.