F.R.
You've gotten good suggestions for brands, but I wanted to note that sometimes switching the type of formula you're feeding will have positive side effects as well. We switched from powder to the ready to feed liquid and it helped with the spit up a lot. Because with the powder formula, you're shaking it up right before you're putting it into their little tummies. Infusing air. With the liquid, it's ready to go and you're not adding more air. Also, try the Dr. Brown bottles.
Good luck!