I have no experience with the Reynolds. I was always very happy with US Tsubaki, till I tried Daimond. The Diamond had very little initial stretch, and hardly ever requires adjustment. It has become my chain of choice.
I would shy away from cheap chain. As it stretches, the pitch changes, and this can cause premature sprocket wear. Having to replace it again a year down the road won't be cheap and will get a lot more expensive if you have to replace a bunch of sprockets too. Just like tools, better to buy the good stuff once than the cheapies multiple times
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