I own 3 Janome machines and I'm awaiting delivery of the Janome 15000. The dealer (LQS owner) has always been a Bernina girl but is totally in love with this latest Janome. I've only recently bought the Janome 8200 to be permanently on my quilting frame - It has an 11" harp space as does the 15000. Guess it shows I'm a Janome fan.
For what you are looking at doing I would recommend the 8900.