I have a Bernina 630e and I love my machine. I bought it used on E-bay about 19 mos ago. Sometimes I wish that I could have gotten a 730e with the 9 mm stitch but have been told by lots that if I do mostly quilting that the 630 is better. (this is because it is easier to do a 1/4 in seam on the regular size feed dogs) I have not checked out the new 830. I don't want to start drooling over something that I can't have. There is no way DH will let me get another machine. Though, he says in a couple of years we can think about a mid-arm quilter.....
Anyway, I am still learning to use my Embroidery Unit and the software. So far I have only used it to make quilt labels.
I looked at a Janome 6600P but decided I wanted my machine to do more. Hope you have fun researching machines.!!!