My mom and grandma had pfaffs when I was growing up - so when I was ready to buy my 1st good machine that's where I went... I drooled over the space in the expression. But, between the time I decided I needed a new pfaff and actually buying one I bought an old singer to FMQ on. I wound up going with an ambition instead... it uses a different open toe foot for FMQ, and my dealer has yet to get one in, so I haven't even tried it yet, but that's OK that's what the Singer is for. I love my machine and have had absolutely no problems with it, aside from thread snobbery. Luckily so far it's just a no name snob - it's ok with Coats&clark and other cheap brands, but the no names stuff I got from Ebay is not ok.
But, if you've already had 2 you don't like why not look at other brands and see if you like them better?