I judged them by weight. The heavy Hall lasts forever and makes turning better. Cools just fine. Replaced with a new Hall rad to utilize the original thermo switches for fans. Previous H had snap switches blocked off and manual fan switch firing both pushers. New Hall has larger fans but same crappy right angle fabbed hose necks. Nothing like a beautifully engineered part with two steps backward . Every 90 deg bend is detrimental to flow. Two 45's are better. Three 30's even better. A variable radius sweep, now you're back to beautiful. Besides, copper and brass are the MOST malleable metals and sexy as hell when hand finished. That's how I'd build it. Supplied with a nice clear finish. Make you paint it crappy black.
How much money you got?