Last backyard BBQ we had we liked the marinade and the cut of the carne asada from Mi Ranchito (the one a half block north of Mi Tierra) better than Mi Tierra. Either way the La Finca chips they both sell have become one of my new addictions.
That's the place, Mi Ranchito. I haven't been to either in a while. I can't even remember which store but remember the skirt steak to be good but not memorable. (better to use charcoal). I'd go with ...tm...'s rec. BTW, I'll be at the game. Go Bears.