Yes - for everything!
I prefer quality over cost. I even buy imported French butter as it makes baked goods taste that much better!
I think the only non-branded items I buy are the sponge metal scourers.
For food I stick to the principle that it's going in my body - I want the best! That said, we don't generally buy many processed foods. We mostly buy fresh foods, so shop regularly at the one butcher for all meat products and the farmers markets for fresh fruit and veg.