which type of pex?

[rose]

So what are the pros and cons of the various pex brands? As well as the different connection methods?
What's the diff. be Uponor vs. Kitec vs. aquapex vs. zurn.
Which connection type is more effective long term?
What's the story w/ oxygen barrier to the pex pipe? Is that something all brands offer?
What do people think about hot water running through plastic pipe in terms of picking up things from the plastic such as estrogen?
Thanks, Rose