I'm looking at different medical suppliers to pick a breast pump (going through insurance), and am having trouble picking!

I got the Medela PISA last time (it's been more than 3 years since I got the first one, so I can use insurance again), and would like to stay with Medela, since I have the parts (I EPed last time, so I do have double parts already).

I'm looking at the metro bag or on the go tote or the freestyle...are those ones you can plug into a wall? I definitely like being able to plug in the pump if possible, and like that style bag since it would be a little easier to carry in.

My other option is to just get the starter kit- the machine itself and parts and stick it in the bag I currently have. I just haven't taken the old pump out of storage yet to see what has happened to it since it's been sitting in a box for 3 years.