Congrats! That's wonderful!
I breastfed, but when I pumped and used bottles I really liked the Drop-ins by Playtex. They are BPA free, which is something you should really consider. I thought they were much easier than washing multiple bottles. I just had extra nipples and washed those in the dishwasher. And for going out, you can just take several liners and a couple extra nipples- less room in the diaper bag. There are a few kinds of nipples that all go on the same bottle, so if you find the baby doesn't like the nipple, you don't have to get all new stuff. I recommend only getting a couple bottles until you are sure they work, so you don't have to spend a lot and then find out baby hates them. Same for pacifiers, we had to try several kinds.
I also loved those sterilizer bags, you might not need to sterilize much though, so dont go overboard on that. Not counting the pumping stuff, I only sterilized a couple times. And I didnt use my bottle warmer much. It wasn't very consistent, and didnt work well with the drop-ins. Hot water was quicker. I did have a bottle warmer that had a pacifier sterilizer on it, and I used that part all the time. For a bottle brush, get the kind that has a suction cup so you aren't laying it down in the dirty sink, and the kind without the sponge is better- it gets gross.
Hope this helps. Congrats again!