I've used the Nashbar/KMC 9 speed chain on Dura-Ace 9 speed gruppo. I have no experience with BMX chains other than the stock chains on Dahon and DT. The NB/KMC 9 speed chain works just as well as the Dura-Ace and SRAM 990 chain (haven't used the hollow-pin version of either, though), plus, unlike the Dura-Ace, but like SRAM, you get a master link. It seems the Nashbar/KMC chain takes more torque on the chain breaker to pop the pin, and the pins are larger diameter and flush. I think it would be harder to "restore" links if you cut the Nashbar/KMC chain too short. The NB/KMC chain may be a few grams heavier. Having said that, if the SRAM 9 speed chain is within a few dollars of the NB/KMC chain, I buy the SRAM because I like the SRAM master link better.