A burrito eater with OCD has compiled what looks to be the largest burrito-centric database of SF eateries (link below). One nice feature is the link to the SF Food inspection dept. web site so you can see recent violations (the violation search feature nixed a recent visit to Irma's Pampagan restaurant a week ago).
The owner ranks Taqueria San Francisco in the mission as the top burrito joint in town. Anyone else agree?