Breast pump help

Hello! I am going to be a working mom and will need to pump throughout the day and need some opinions on breast pumps. The room where I will be pumping is right next to some offices, so I would like a pump that is quiet. Right now I am debating between the Medela Pump in Style and the Spectra S2. If any of you have any insights on these pumps or any other ones I would love to hear them!