Chains comes in different brands. Daytona, D.I.D, RK etc.
RK and D.I.D are the very top graded brands of chains
available.
Normally there's 3 kind of chains,
1.) Normal
2.) O-ring
3.) X-ring
I think D.I.D and RK carries only O-ring and X-ring. Gold is just
the colour, looks more nice.
O-ring is the technology that traps the grease in every gap of the
rings so that your chain will stay lubricated all the times, and to
prevent it from drying so fast.
X-ring has the newer technology, to trap the grease in it.
So i suggest, u get a X-ring chain. (i'm using for the moment)
D.I.D or RK, also very good, up to you.
And lastly, O-ring and X-rings lasts very long and very durable,
provided u lubracate it frequently, and take good care of
it.