Search:

I use Chosera 1k, 3k, and 5k then SP (SS) 8k and 12k. The Choseras have a nicer feel, stay flatter and possibly stay cleaner than the SS. But as far as the edges they produce there is not much...

I'd say that you are not doing enough on the 5k. Are you using a 3k before the 5k? If not, that will make your 5k work faster.