and Bottle Feeding - which bottles?

I have a 7 month old that I am still feeding but she has bottles sometimes and I use the playtex vent air and the nuk orthodontic. She seems to do well with both, except when she was littler I used the nuk's more because the playtex ones seemed to come out too fast for her. Also the only problem I really have with the playtex are that if you set them on like a counter top, etc... for more than a couple minutes they will leak out the bottom because of the air vents in the base. I wouldn't recommend the Dr. Browns Natural ones or the other Natural ones... I can't remember what they're called, but the Dr. Browns are just silly... they don't help anything and there are more parts to them.. and the others are supposed to be more like a mothers but my daughter had a really really hard time getting milk out of it because it goes through 2 different chambers... she was very unhappy when I used those because it was so much work... it took about half an hour to get 2 ounces out. I would like to think my daughter doesn't have to work that hard at it when shes actually feeding so she shouldn't have to when shes not. Good luck and congrats on your new baby.