It was time for a new chain on the road bike, so I went down to the LBS and all they stocked were SRAM chains. I've always used Dura Ace chains for my 9-speed Ultegra drivetrain, but I bought the high-end SRAM chain with Power Link as I didn't trust the old chain any longer. $35.
The Power Link went on like a dream and seems like a too-good-to-be-true solution to chain maintenance. It rode quietly and shifted smoothly, too.
Are their any opinions on the Power Link or SRAM vs. Shimano chains?