I use Tommie Tippie. It just looked 'cooler' than the rest. Lol. But I also bought into that 'closer to nature' stuff. I also love their wide variety. At the end of the day its what works for you. Baby won't remember a thing and would be happy with anything you gave them.
I would suggest only buying two bottles as you will only find out what works best for baby after he or she is here. I bought a lot of Tommee Tippee bottles, only to discover that my baby couldn't manage with those, the milk kept spilling everywhere and she couldnt latch properly on those teats. Eventually when she was 5 weeks old I bought a Dr Browns bottle, and boom, problem solved. Expensive mistake to make though, as I had like 8 or 10 Tommee Tippees