Current Projects chat and miscellany

Can anyone suggest a track (but also street use) chain for around the £10 mark please? Am using a 19t surly fixed cog, not very worn at all on the street, should I get a surly 15t track cog also (as opposed to any other brand)so that wear and tear is as straight forward over all three parts as possible? (minimal noise etc)

KMC 510HX or nothing else