Which restaurant in Xian will have the best yangrou paomo?

Laosunjia Mutton Stew is the most famous, and there are a lot of branches restaurants in the city. Here is some address of the restaurants.
No. 78 of Dongguanzheng Street, Beilin District.
East Street, near Bell Tower.
No.173 of Dongyi Road.

If you wanna try it on the Muslim Street, the Lao Mi Jia Pao Mo is the best choice.