The simplest answer - Call Dennis. He's great to work with, will listen to what you are looking for, will ask all the right questions, there's no pressure to buy or try to upsell you. But, from what you've told us, it sounds like the 22" TT is what you're looking for. Unfortunately, I couldn't find the info to do a direct comparison (see advice to call Dennis), but your Large BGE has a cooking area of 262 sq in. The 23" main grate (roughly the same size as the 22" TT's) has a cooking area of 375 sq in. = 43% bigger!