There are other variables in play, especially races: Asian, Caucasian, Black, ... A best place for one might not be the best place for another.
My experience, the best place was DXB in the aughts, but you'll need to take Mr Peabody and his Wayback machine to get there. Prices higher, but so were salaries, and all races available: Russian, Eastern European, Stani's, PRC's, Africans, Iranians, Turks, etc., etc. Plus the venues, bars with FL's. Long time was LONG, all night. And with a PRC, she'd go to the supermarket with you, help you pick out fresh produce (myself, very unfamiliar with such), come home, cook dinner, clean, BBBJ/CIM as an appetizer, massage, some stimulation for her, FS, sleep. Morning wakeup. For residents, couldn't be beat. I once thought it was BKK, but after DXB and its variety, BKK trumped.
Now, I like BKK, but then again, I KNOW it.