Chain Q?

x2 on that, orings usually last much longer and dont stretch like a standard chain because the oring keeps dirt out of the moving parts. they cause a small bit of extra drag but in most cases its worth it.
 
That is a 20 minute chain, ride for 20 minutes then tighten the chain. If you do not want the O-Ring then at least get their NZ chain. It is of better quality and will last longer. If you want the best, get their ATV/X Ring.