I'll be reading this thread, too.
I have a Grace hoop, but to be honest, I don't care for it. It doesn't hold the tension on the quilt as well as I like. Maybe it's me - I prefer a floor frame. Plus, if you're working on a large quilt the post the hoop rests on can get in the way and make it difficult to turn the hoop.
On the plus side, it is adjustable - you could quilt sitting on the floor with it, or standing up.
The Jasmine hoop that Andrea has is hard to find. I've bid on two on eBay, and been outbid every time.
Janet