I also have a Pfaff and I love it. It was well worth the money as it has run circles around other machines that I've had in the past.
I DO put it through the paces, well actually, I over-work it to a fault and because of that, I've had to take it in a few times for servicing which is to be expected. My problems have mainly been that it tends to jump out of time, the buttonholer seems to skip stitches in reverse and the last problem was the bobbin casing jumping out of it's track. All of these problems were after running the machine for 6 or more hours at a stretch and all were quickly and cheaply fixed by the dealer.
Even though I've had "issues", these have been NOTHING in comparison to the Singer's that I've had that I had to replace the computer boards on at least once a year. I've also had one Janome which I returned to the store less than three days after I bought it - now THAT one was a real piece of work! LOL
Even though Pfaff's are expensive, I was able to get a really good deal on a basic one for my DD for Christmas a couple of years ago - it was $239 and it works like a charm! With the economy being what it is, I would check out a dealer as they may be more than willing to give you one heckuva deal on one right about now, along with a few little "extras".
Paulette