Mexican Food For Gf's Birthday
I don't think I've ever been to a romantic Mexican restaurant. Maybe the closest thing is La Hacienda, but, I haven't been. It's not very near DT Phoenix, either.
There are many flavors of Mexican. I like Gallo Blanco and Barrio Cafe, but, they might not meet everyone's expectation of Mexican. Both places can be loud.
If you like New Mexican style food, Richardson's might suit you.
There is a lot of information in older threads, written when this board was more active. Most of it is probably still fairly accurate.