What chain should I buy?

hippy [quote]31trum(murtle) seem to be fairly tough, although lpg managed to snap one
they do seem to stretch a bit, only had it 3 weeks, so it might settle.

Also, most chains fail due to improper pin alignment which is usually due to poor installation.[/quote]

I'm assuming the 1/2 link chain has twice as many pins - therefore twice the risk of dodgy factory pin installation (but it's usually down to slack chaintool work in an lbs or by the user; no offence to lpg and his SRM stats ;-))

For the record, my Izumi super toughness was fucking loud no matter how clean or dirty, and I've had just as good performance from a KMC Z510hx that was about a fifth of the price.