I'm another Janome fan (I have the 7700 Horizon too)and I don't think you would go wrong with a Janome. The Horizon is quite expensive but I don't think there's anything else I would want on a machine for quilting...it has an extra large harp area for fitting large quilts into an a host of stitches, including a few different blanket stitches. I love to applique with mine as well. And I love the built in walking foot.
But, as suggested, go and try them out and see what might suit you and your budget the best.
Good luck with it :)