KMC 710SL chain is a good choice and comes in black, I've run the gold version on 3 bikes and like it lots. The EAI cogs are nice if you don't mind spending a little extra, also been running an All-City 19t track cog on my Pake with no complaints, less money. I don't know if skid spots are important to you but 48 x 18 only gives you 3. Also something with the way it wears the drive train. I would suggest going 17t & 19t. Or going with a 47t/49t chain ring instead. I run 47t and it's nice being able to choose any cog and get maximum skids spots and spread the wear out evenly.