Light(ish)weight Pompetamine

Yes, galvanised chain is probably more corrosion protection than you need if you're not riding on salted roads, but the Wippermann is also cheap.

FWIW, I've just put this KMC S10 (aka Z1X-Inox) on my MTB, wouldn't have paid £20 for it but for £8.99 it's a bargain. The weight weenie option would be a 9-speed chain, pretty much all 3/32" single speed rings and sprockets will happily work with 9-speed chain and it's a little lighter than 8-speed. I wouldn't, but I'm not weight obsessed about any of my singlespeed bikes.

Looks like there's no more than about 50g in it, so I'll defer to whatever the conventional wisdon on reliability is. Rather a sturdy chain, than a light one that might break - not that I'm paranoid or anything.