Re:
Kmc or sram are my go to chains. You can go for the cheaper options or costed, lightweight links too, though the lighter ones tend to wear a bit quicker in my opinion,but look pretty cool and do save a relative bit of weight.
I prefer the silver ones over the darker metal, look nicer and easier to tell when they need a clean.
The split link is so useful when fitting/removing, though some split links are single use.
I've gone higher up the food chain (pun intended) and used the likes of wipperman but was not impressed and had issues with shifting, split link bouncing on jockeys and wouldn't say the pain resulted in any benefit such as longer life.