Quink,
I've had my pavoni for about 4 years now, I probably over-use it a bit (according to my wife). Over the 4 years I have had to replace two sets of seals and one group head insert. The seals I replaced just as a bit of preventative maintenance (a full set of seals are about £8 ($15 ?) and take about 15 minutes to fit. The group head insert (including seals) was about £12 ($20 ?), and that was my fault!
I have freinds who have Gaggia bean to cup and others with pump models. The pavoni gets me a better cup 100% of the time.
Milk preparation takes a bit of getting used to, but like riding a bike...once you get it nailed its easy.
Oh, and you can prepare steam your milk and prepare your espresso and steam more milk etc etc without waiting....the boiler appears to keep up with steam output (on the 16 cup model at least!).
My rating? I wouldn't give it up unless I got a commercial machine....but even then, it would have to have style like the pavoni!