I think this was talked about way back up in this thread last year.
The suggestion to use pods instead of chili powder is excellent. If you have not done this before, get five or six ancho pods per 2# of meat. Remove the stems and as many seeds as possible. Simmer in hot water for about 15 minutes. You should be able to split them and scrape the pulp from the skin. Puree the pulp with some of the water used to simmer. Use this slurry in place of the chili powder and then add the other spices that you would want to add. Remember chili powder has spices in it already unless you used pure chili pepper. Roux can thicken to your desired thickness. Tomato paste works well for this also plus it is a great flavor enhancer.
Lots of variation on this simple process can be done. The chili pods can be smoked, roasted in a saute pan, or you do not have to remove the pulp from the skin - use it all. Each of these changes the end flavor.
You can add other pod varieties or chili peppers as you like.
As far as the chili championships, those guys are very serious and they do have a goal in mind. Typically, I find their actual wining pots of chile too spicy for the general public. However the process of adding spices at different intervals does have merit. Layering flavor over a period of time helps release the oils and glutamates that enhances flavors - much like keeping chili or pinto beans overnight and finding it tastes better the next day.
This will be a good weekend for chile.
Gig 'em Aggies!