I have a Pfaff Expression 2.0 and I love it. I have made 144 full sized quilts on it and 54 wall hangings, and it is still going strong. I got it in 2009. I had it serviced the first 3 years, and then the shop went out of business. I clean it myself now...of course, not nearly as thoroughly as a dealer could. But it is still going strong. Of course, I don't know the life span of the computerized part...but mine still works well.
You will make the right decision for you though. Take some fabric and drive each one. I drove about seven machines, two different shops, before I decided on my Pfaff. But buy the one that makes you happiest!!
Dina