hi
I bought the Avent hand pump first....and the a second one with the storage cups....
then on going back to work as I was already in love with Avent, I bought the Isis Duo....the double electric. I love it, works well for me (have a fast letdown, small boobs (34 B at best).
A friend used the Avent Duo but HATED it, switced to the Medela pump in style (pumped for triplets for a year...).
I think it depends on taste very much.
I just love the Avent range and how the things go together even thro the toddler years...
good luck! My duo is still going strong second time around now, use it at 7 and 10am after feeds are finished. Will not need it as much in work this time as I will be off till DD is around 8 mths, whereas with DS I was back in work at 4.5 mths, so big difference!
hugs
Siobhain x