I have a 7 ft. dynamo coin op table..i am wanting to refelt the table and put new rails on it. Im wondering on the difference between mercury ultra cloth and simonis..i know simonis is the best but they say mercury ultra is just as good but quite a bit cheaper..i need some opinions?? I am also wanting some opinions on rails..i was looking at k66 rails. How are those?? i also know ridgeback rails are really good..I need some help so i can get the best play out of my table but for a little bit cheaper price....Thank you in advance for any input..