I am so overwhelmed with the options I was given (so many vendors, so many pumps) for my free pump this time around.

Any advice would be helpful ... not sure if it matters, but I have small boobs, will mostly be pumping at home, and struggled with low supply last time.

Here are the options:
Medela Pump in Style
Ameda Purely Yours
Natures Bond
Freemie Freedom Deluxe
Spectra 9S
Tomy Quiet Expressions Plus

The other vendors just say "Medela and Ameda only", with no specific pump listed - is there a specific one I should see if they carry? I had the Pump in Style last time, and it seemed to be ok.