I don't use one often enough to consider an electric. It's not good for rechargeable batteries sit for long periods of non use. They sure do sound like they are dandy though.
I posted this same question over on the Garage Journal forum as well. Got a lot of good feedback.
I ended up ordering an Alemite 500 hand lever model. I still might consider a Lincoln pneumatic down the road but I'll see how this Alemite works for me first.