I've been eating Manchester Mexican for a while, and it's come a long way since Barburrito first opened. Changos has been good, but not very vegan friendly (their tortillas use milk). Far and away the best has been Enriquez and Panchos; I'm surprised you had an underwhelming experience there. He has some great things beyond just burritos - it's worth checking out his full range. The chilli is very good and from time to time he tries out new items - sadly my spanish is not good enough to remember many of the names! If you're struggling with uninteresting food there, try out his home-made moles, and his habanero sauce will peel the flesh off your eyelids. The guys are very sensitive to vegetarian and vegan diets too. Plus there's something rather transgressive about a crafty tequila at lunch in the Arndale shopping centre. Don't forget the new addition to the empire, down by Zouk off Oxford Road.