I just got a Bernina 430 and am in love with it. I upgraded from my mass market machine for more throat space, and while it isn't huge, it is bigger than what I have. I paid 10x for this machine what I paid for the last one, and it is without a doubt 10x better- just so many features. I've gotten a twin size quilt completely under the harp, to do something on the far edge when I didn't want it to be directional (I don't quilt as well pulling as I do pushing), so if I did a queen from center out, I would be okay.
I really wanted the Janome Horizon 7700 for the larger harp, but it was $1000 more. Since the Bernina also came with embroidery, I really couldn't justify that extra $1000. (I originally had hoped to upgrade to about a $600-800 sewing machine, but ended up spending $2000 when I realized that my price point wasn't going to get me what I wanted at all, and I might as well stay with my $200 machine... definetly worth the money, but it is going to have to last me for the rest of my life!)