Quality-wise definitely Stubben over HDR. But with that being said I didn't like the feel of all Stubbens I tried (and the dressage one I tried couple months back didn't put me in correct position like my Thornhill does, don't know about jumping ones though).
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."