Dr browns or ventaire?

I have twins, both about 5 weeks old, both cry all the time! I do everything you could think of, I check to see if the diaper is dirty, then I check to see if they are hungry, then I check to see if they need to be burped, then I hold them.....and then repeat the process....I took them both to the hospital after living on 45 minutes of sleep a night for one week and coming down with bronchitis from a neglected cold that I couldn't recover from due to the lack of sleep. The doc told me it could be colic and to purchase better bottles...so after some research I am looking at Dr Browns and Playtex Ventaire. I currently use Playtex, the ones with the disposable liners. Any advice from somebody who has expieriance with either brand would be greatly appreciated!! Also, tried gripe water with both girls, and it makes them vomit thier entire bottle. No reflux, or anything like that.