I am amongst the Janome believers... I purchased my 6600 almost 5 years ago and it pieces and sews beautifully and I have had no issues FMQ smaller projects (baby quilts, runners, twins and laps) but I recently took the leap and purchased the 8900. Not only does the extra few inches of throat space make a difference it FMQs like a dream.
I was feeling guilty about keeping both machines but I just can't part with my 6600. I would make sure if you are looking for a new machine, you test drive one and also consider how far your dealer is if you need service. If you are interested in FMQ, make a couple small sandwiches and take them when you test drive.