Which Breast Pump?

Lea
I finally got my insurance card in the mail! My insurance covers 5 different pumps but I'm not sure which to get. This is my second child and I'm trying really hard to breast feed this time. Any recommendations would help!!! 
I can choose one of these:
1. Spectra S2
2. Medela Pump In Style Advanced Starter Set
3. Ameda Purely Yours
4. Ameda Ultra with Dottie Tote
5. Ardo Calypso Essentials
Thanks in advance!