Hi..I just got the Janome 6600P, and it is a wonderful machine..I love it too! There is a 6600, that is different than the Professional model. The dealer also has classes, that is included, where he teaches you things that are not in the book, its a 3 1/2 hr class, for 4 days....12 hours total.
I paid 1499.00, he wouldn't come down at all, and this was during his 'sale'. It is regularly 1999.00, but has been discontinued. The speed is one of the reasons I liked it, and the double needle option...I am sure you know all about it's options, though. It does not slide, or move, when quilting, and that's important to me too.