I agree with you. We used to stick to a few brands, as they taste good and we like them as well, moreover I always thought those cheaper brands might not taste that good and the quality might be poor too. But same as you, the tuna brand that we have always been eating has increased their price gradually, and now it has become really expensive, hence we started to try out other brands. We found there are a few brands that taste quite good too, though I still think the brand we have been eating is still better, perhaps it's just because we got used to that taste, the rest are fine too. When considering the cost, we always go for the cheaper brands now. We also buy the brands whenever it's in sale, so it helps to save us more money.