What is the best product to use for acne prone skin?

1)Ettusais
2)Dermatologica
3)Clinic
4)Khiels
5)Dior
Or is there any brand you can recommend that has highly rated comments by users with acne prone skin? Thanks! I've been unsure as my acne has persists for 5 years already. I don't want my face to have any further scarring effect. Also i've been to skin doc at National Skin Center in Singapore but the medication they prescribed was too harsh on my skin resulting in skin discoloration. I've also been to beauty centre that provides facial wash to assist in eliminating acne problems. But they have all been no results except for one which is New york skin solution. However, its too expensive for me to carry on. Within just one month, my acne came back again. I've also tried many of the brands that are bing sell in Watsons and Guardian.
Need something really effective and can be use for long term.