"best" North Dallas AMP?
What are you looking for? Massage with L1? Do you want L2/L3? Table shower?
If the massage experience is what you want, the Chinese places are better, and some have some genuinely pretty girls. Sunny as well as the two places in North Plano (one on the east at 15th/Custer and the other at 19th/Ave K) have licensed masseuses and often the girls are pretty. Not all girls offer extras beyond L1. Most of the other spas in Addison, Richardson, etc., will tend to have older ladies but sometimes they get young talent, and some give such an intense massage/L1 that you won't care that they're a bit older.
A new place in Addison, Sha Sha, is in the old OMT location. Older girls. Insist on seeing their manager, Stacie. She's about 30, pretty, gives a good massage and some of you may remember her from a place in Plano that's since closed.
If you are really looking for the most BCD mileage you can get with the prettiest girls, you have to go to the Korean spas. These girls are always made up, wearing cute outfits and they always smell good (even the kimchi breath becomes a turn on over time).
Sadly for me, my favorite places are few in number and their quality has diminished. I used to love the Chinese/Taiwanese high-end apartment places. They had consistently gorgeous girls and emphasized the massage more than the Korean places which IMO are a bit "wham-bam thank you ma'am" but they offered a more attractive alternative to the Chinese studios with more BCD options.