You can pick up good Indian spices in any department stores like Fab Mall in Forum Mall or Garuda Mall, Spencer's on MG Road, or Nilgiris on Brigade Road. Asking for curry spices or "masala" as it is called in India will get you what you need. There are a whole lot - so check the range of "masalas" offered by good Indian spice brands like MTR, Everest and Ashirvad. The staff at the department stores will be able to recommend what you should buy.