This does work nicely to add another layer of flavor. If I go this route, I only smoke some of them (and I actually don’t like it too heavy on the smoke, just enough to have their presence felt. Use your own judgment.)
Another thing I like to do, in addition to all the great advice above, is to use a mix of textures of beef. I’ll do hand-diced/cubes chuck (good) or boneless short ribs (best) along with some ground beef (either chili grind or regular ground chuck.)
When entering a competition, I find that concentrating the flavor helps. This is where a stock cube or two or three or even straight up MSG works. Bringing home the umami helps bring home the trophy. Or go the fish sauce route for the same effect.
I don’t usually use beer, but when I do, I like using something middle-of-the-road and a bit sweet and malty, like a Newcastle Brown Ale.
For beans, when I use them, I like any of pintos, small red/kidney beans (not the regular ones), or black beans. Or a mix if I’m feeling particularly beany. But even here in the Midwest where everybody wants beans in their chili, I’ve been successful doing an all-meat chili (OK, I finished 2nd in a field of about a dozen last time with an all-meat chili last time, but it does help your chili stand out from the rest of the crowd. Plus my wife and friend forgot to vote, and I only lost by 1 vote.
) And the person who won also had a very simple, straight-ahead chili, with some beans, but not a whole lot, and no oddball ingredients. No corn, no bell peppers, no sausage, nothing like that. Remember, this is a beef stew. Bring forward the beef. (Except when I’m purposely doing an “everything but the kitchen sink” chili for myself and want to fool myself into thinking I’m eating something slightly healthier or am trying to clear the fridge.)
And, personally, I always use chili powder in my chili. I’ve made it with chili pastes, and it doesn’t taste quite right to me. It could be my own chili powder, or it could be Gebhardt’s or some mix of the two, but it needs some dried chili powder in addition to any other types of chiles you use. Unlike many cooks, I also don’t like using fresh chiles in my chili. It just doesn’t taste right to me, especially green chiles (unless I’m making a green chile, of course, but that’s a whole different beast than your usual chile con carne.) I almost always only use powdered chiles and/or whole dried red chiles that have been toasted and reconstituted and mixed in with the chili powder or ground down to make their own chili powder.