I have the Medela mini electric from John Lewis, it's very loud and pretty hopeless tbh.
I also have an Ameda Lactaline dual which is okay and I have a Spectra 3 which is brilliant (and can also be used as a double). I use it everyday and it's about £50 new from Amazon. Spectra 3
There's other Spectra pumps as well, I think mines is brilliant. I mainly express and have been using this for months and it's still as good as it was.
I have also had an Avent Electric which I also thought was crap and took back to the shop.