I have the Electric Medela Swing aswell. It is great! Although I only need it to pump feeds when I go to work, I find it so easy and effecient. It may a good idea to wait till you see how bubs is?? Different pumps suit different needs like Mantaray said....
My friend had the Avent hand pump and got mastitis 3 times....she seems to think it was linked to the pump not emptying the breast properly. She had medela in hossie as her bubs was prem.... she didn't have any problems with that one. I guess everyone is different.
Anyway, I love the Medela Swing... they can be an expensive outlay (luckily my mum bought mine for me) but so worth it for the next one too that's what I keep thinking anyway!
Goodluck and all the very best for your birth
Rach xx