HotI I have to *spread the love*.

I have a Medela one (or two) because I have a Medela pump but am yet to actually buy bottles as at this point the pump is going to be for a freezer store for a few months.
Last time I had an Avent pump and used the Tommee Tippee Close to nature bottles.
Go for something BPA free.. and HotI is right, the marketing is a gimmick - nothing can truly mimic your breast ore breastfeeding itself.