I have a Juki 98Q and a Grace GMQ frame. And I totally love them. However, I want a long arm now. It will be a few years before I get it, but the Juki will stay forever. It's a workhorse, and I use it both on and off the frame, which you can't easily do with many of the long arms.
The downside of the Juki is that by the end of the quilt, you only have about 4 inches of space to quilt in, which limits what you can do for designs.
You might also check out Nolting machines, which is what I am leaning toward when I get a longarm. Good prices and simple machines.