Hygeia. I have a Medela Freestyle, which is awesome, but not covered. I have a Medela PISA, and am not a huge fan. I have an Ameda Purely Yours, & it's okay.
I like portability, and I don't like open systems. The freestyle is the ultimate in portability, and mine is still going strong after 2+ years of 3 pumps a day, but it, like all personal use Medela pumps, is an open system.
The Ameda will work on disposable batteries, but that can get expensive.
The hygeia combines an internal battery with a closed system. It's a good company...when Ameda-Egnell split years ago, hygeia is the offspring of the Egnell technology.
Mama to a beautiful deaf son (bilateral cochlear implants - my baby can hear!!) born 6/13/08 and a hearing son born 1/7/10, who are intact,
DC3 coming in July