Honestly, just buy whatever is cheapest and easiest for you to get wherever you shop. They are all the same (even the cheap ones compared to the expensive ones) because they have to be. They also all smell and taste equally rank! One thing might work better for you than another, but I'd stick with just the regular infant milks, not go for the colic or hungry baby ones. Some people swear by them, but I think it's just a gimmick and most 'colicky' or 'hungry' babies actually need something else (like medicine if they have reflux or more regular feeding or just to be held). I've found gripe water added to a bottle on the rare occasion I needed it for reflux or constipation was the best thing, rather than buying a milk with added crap your baby might not need all the time.
But honestly, if you're planning to breastfeed, steer clear of formulas. You don't need to buy them in advance and the best way to make sure you succeed at BF is to do it and not top up with formula, unless there is a real medical need to do so. If you do have trouble and decide it's not for you, you can easily buy some formula. My daughter had terrible latch issues and could barely BF, but even we made it 10 weeks and didn't need to keep formula in the house 'just in case'. Your partner can always run out and get some if you need it. One thing I would recommend though is a quality breast pump, some bottles or cups (cup feeding is recommended over bottles in the early weeks if you do plan to BF), and some sterilising solution in case you need to express.
