What kind of breast pump do you use?

Aria
I have to pick out a breast pump as part of my benefits but not sure which version is best of the Medela brand. If you are a Medela user, which model did you pick and would you recommend it?
This is what I can choose from:
- Pump In Style Advanced Breastpump available in either plain black  shoulderstrap "On-The-Go-Tote" bag  (#57063) or plain black backpack styled  bag (#57062)
- Advanced METRO Breastpump (#57036) available in a black  shoulderstrap bag with buttercup trim 
- FREESTYLE (#67060) available in a black shoulder strap