Just an opinion, but with the cost of sprockets entering the equation, you may find that the cost changes...
An o-ring or x-ring SHOULD last 2-3 times longer, resulting in sprockets that last through the chain life.
If you use a non o-ring chain, you may be able to use the sprockets a 2nd time, but normally the 2nd chain will wear faster as well.
My factory chain/sprockets only went 20,000 kms and were completely toast. I've got another 28,000 kms on a Regina O-ring set, and wear is still minimal. Should go 40,000 kms for sure.