The x-200 should come with a endless strip. If you went with a flemish and added silencers to the string, you should be able to eliminate most of your issues. A standard b-50 flemish 14-15 strand with work fine. One advantage to the flemish is the ability to adjust your brace height and that will remove a lot of noise out of the bow.
If you are having issues with the nocks, you can order a string with smaller serving size on it to help with the problem. Let me know if you have any more questions. I have built a couple (100,000)strings in my day:)!
Hope this helps