Hey, I ended up not making the queso, but probably multiple ways to do it.  I don't like flour roux, I prefer melting cheese in heavy cream and thinning it out with milk or half n half whenever I make any kind of cheese sauce.  I'll fry up the chorizo and drain it, then stir it into the cheese sauce.  Serve with warn corn tortilla chips.  At the restaurants they sometimes serve with actual corn tortillas and chips.   I like a little salsa on the side too.  And of course margaritas!
I ended up not making it because the chorizo I have in the freezer is a 1 pound package.  It's just us 2, so that's a lot of meat I'll need to use up.  I'm either going to wait until we have company over or I'll make some chili and add some chorizo to it along with ground beef.
Edited to add that some people add a bunch of other stuff to theirs that I never thought about doing.  Guy Fieri (US TV personality and chef) uses beer, serrano chiles, green chiles, garlic, diced tomato and green/spring onion, and 3 kinds of cheese.  I don't go through that much effort and I don't think I would like the beans in mine.  I really just like the chorizo and cheese, but I suppose a little heat wouldn't be bad and the garlic (of course), tomatoes, and green onion would be okay.  But since I have a bowl of salsa next to the cheese dip, I sometimes will dip a little into the salsa and then into the cheese dip on the same chip.  Similar flavor profile, I suspect.