I use Medela Lactina Plus (hospital grade) and a Lansinoh Double Electric (about $150!) I also used a Medela Symphony Plus (another hospital grade) for a week.
By far, my favorite is the cheap Lansinoh. It's far more comfortable and I like that I can control both the speed and the suction (this is not possible with either Medela I've used). As you can see by my sig, I've had lots of experience with pumping in the last 8 weeks.