I use the Lansinoh Double Electric pump as well. It was affordable because I used a 15% off coupon and applied for a Babies R Us credit card and got an extra 10% off the already competitive price compared to other brands of pump. I find it very easy to use, not too noisy, and even though I haven't used the feature yet, I like that it can operate on batteries if I need it to.
As an FYI, it's the same pump as the Ameda Purely Yours, so all the parts are interchangeable.
My only complaint about it is that unlike Medela pumps, the spare parts aren't widely available in stores, so you have to special order stuff (I needed smaller flange adapters, etc.).
It works really well for me, though, and I find it pretty comfortable to use.