Well I have some thoughts on that topic that may help you decide. I posted in an earlier topic about this very thing. Here is some of what I wrote in the past.
"I read somewhere that after 7 years, items drop off of your credit report, doesn't that mean that the credit bureaus are doing credit repair for us then? Why woult I wait til then, so I dispute things now. I feel that I get punished enough with all the debts and CA's I have to deal with. Here is another good point, the credit bureaus are in the business to make money, right? We know how they make money by capitalizing on our information. So why do I have to support there captilalistic ventures which can have a potentially profound negative impact on my financial life? Someone once asked me when I disputed something on my file if that was right and ethical, I used to think that way. But now, I have no moral obligation to support corporate greed because of that."
Like I've said before, I wouldn't advocate running up a bunch of bills just to dispute and not pay. I am paying on my bills but it seems like everytime I turn a corner, something else hinders me. So I feel that I am just leveling the playing field. I am paying on legitimate bills, but at the same time, I have to have a fighting chance to get by in these hard economic times and give me every edge I can get.