I've had an NRS Paragon for 8-10 years, looks very similar to the Granite Gear, at $55.00 I'd call it a bargain. It fits both 30L and 60L Blue Barrels. Never had a problem, straps and waist belt are comfortable enough. Just my opinion, but when you think about it, it's only shoulder straps, a waist belt, wide nylon webbing and some Fast-Tech buckles. NRS makes good quality stuff.
NRS Paragon Harness