Why no one mention shin kee 新九如? This is the best known petaling street beef noodle. (The shop is located at the street along kota raya jalan tun tan cheng lock, operating in the morning till afternoon, at night they have their stall in petaling street near hong leong bank) You shall order the dry version so that you can taste the minced beef well. The minced beef mixed well with their noodle especially lou shu fun, and their beef slices are very smooth and tender!! The beef balls are bouncy.. yummie.. 
Around petaling street got few beef noodles such as soong kee and a beef noodle stall inside lai foong coffee shop.. i've tried all these and i can say that Shin Kee is the best beef noodle that i've tasted. Melaka got famous taiwan beef noodle, i have tried it, but their beef slices sucks.. seremban inside pasar that one i haven't  tried.. i may go there try one day..