I have a pfaff and love it. I have a quilt expressions 2048, it's about 5 years old and it's awesome. I want to upgrade to the 4.0 and probably will in the next year.
It's a German design, but was sold out to the folks who make Viking in Sweden. It's a very well known brand.
Check out this site for reviews on the various machines (along with a ton of others).
http://sewing.patternreview.com/SewingMachine/