+1 for Wippermann chains, but I'd discard the cheapo version of the Connex link that comes with the lower-end models and substitute one that allows you to open it again and take the chain off the bike for cleaning etc. (these come with the 808 and upwards as standard but are also sold as a spare part). The cheaper connector stays put once in place and the pin design doesn't make for easy re-joining of Connex chains with a link tool.
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