It is such a beautiful quilt, I think I'd try to have it professionally longarmed, especially if you are new to the world of quilting obsession...You can see from so many here who have been quilters for awhile that it's difficult to figure the best quilting pattern for something this intricate and lovely. I don't think I'd have it too densely quilted because that will add to the weight of the quilt and make it stiff.
You are to be commended for your lovely work!