Just give Dennis a call. He'll answer all your questions, and no pressure to buy until you're ready. Bosco talked his ears off - LOL!
I have a 23", and I've done a full packer cut of brisket with no problem. Could have easily put a second one on the upper grate. I have a rib rack and can do 5 racks at a time.
You can get a surprsing amount of food on the various cooking levels on a 23". I'd only say to go for the 32" Big Bad, if you do a fair amount of grilling or entertaining, with more than a half a dozen guests.