Formula feeding

Mommies that feed your babies Formula.. What is (in your opinion) the best formula? My baby is almost 1 month old and he is exclusively breastfed but my back hurts soooo much from breastfeeding for the past 2 years (I was breastfeeding my now 2.5 yo before new baby) that I would like to give him at least 1 bottle of formula a day, also so it's not so hard getting him off the boob later on.. What do you guys recommend? And also best bottles?