Try to BF as much as possible. If your wife is not able to produce that much then supplement with formula.

You can do hybrid also. Meaning despite having sufficient bf, you still give formula. Some parents do this to give their child additional nutrient. I think this is fine as long as there's no negative reaction from your baby.

If you give formula, do monitor for things like allergic reaction, taste preference, change in stool, rashes, etc.

Some formula are expensive not because they are better, it's just they are formulated for different needs. Eg. milk for baby who easily vomit (anti-reflux milk formulated with some coagulant agent so it solidify easier), milk for easy digestion, lactose free, etc.

If your baby dont have any issues, just stick with normal formula. Watch out for things I say above, then switch around and find out which suits your baby.