Just wanted to give a shout out to the Nan Zhou Hand Drawn Noodle House in Philadelphia's Chinatown. I stopped there for a quick dinner last night. They make Lanzhou-style la mian, real handmade noodles, and this makes a world of difference. The bowls are big and pretty cheap ($6), and it tastes just like Chinese soup noodles should taste. I had the typical Lanzhou-style beef noodles (niu rou mian), but there is a variety on tap.
Since I was alone, I had to sit at a large round table across from a couple and their young son. They were very nice people, who were also clearly enjoying the noodles. The woman recommended the noodles in peanut sauce, said it was the best she had ever had.