I currently have a Viking 1+ which is a workhorse, so I looked at the 875Q. I love the wind bobbin through the needle function and the sewing advisor.
But I also tried the Janome Horizon 7700. I really liked the feel of the Horizon. It just felt more stable and substantial. I really liked the dual feed and the quick adjustment to the single hole plate.
If I were purchasing a new machine of that type, I'd select the Horizon. I've decided to get a combo sewing/embroidery machine instead.