If you run brakeless I would recommend a decent 1/8" drive type chain. Get the length correct, then use a good masterlink.

If you use a chain tool to drive a rivet in, use the unused factory one that comes with some new chains. I don't recommend reusing a link that has been driven out. You can probably get away with it but I do not like to take the risk.

I currently use a KMC Inox stainless steel (~$15) and a PC-7($20). The ss masterlink crapped out so I got a new one and it works great again (please read earlier link about masterlinks).

I have had two misshaps this year with chains on my fixed. It sucks large so buy a good chain!!!!