I had the Ameda Purely yours, and while I loved it, I did burn out one motor (and killed another whenI dropped it) in 14 months

I don't know if the amount of expressing I was doing was a factor, I was doing 30 - 40 minute stints on the pump - I was told of one woman who had used it EE for 12 months & then passed it along & it was used for another 12 months... so they are a heavy duty pump. Also all Ameda parts are interchangeable. I ended up with a hire pump, not the Purely Yours but the parts I had fit it, so I didn't have to buy new bits - i like that - and they are fairly easy to come by.
So in spite of the fact that it didn't last me, if I had to do it again I'd be happy going with the Ameda.

I bought my pump (new) from eBay for about $300.

Also have you checked out the Exclusive Expressers thread - lots of stuff in there you might find hepful.