Big C is Ekamai's biggest grocery store, and this Big C Extra version (the Extra shops have more gourmet products and are far more extensive than the regular shops) is the place to buy food in the neighbourhood. Check out their Casino brand products (Big C used to be Carrefour), they have some good versions of imported cheeses and meats, and in addition to groceries, the market also has a large selection of household, electronics, and non-food items. Between this store and the neighbouring Index Living Mall, you should be able to get everything to stock a new home or condo, and just because it is in a high rent area doesn't mean prices are obscene. Big C has a lot of value items priced the same as in their other stores around town.