I edit like crazy. If my answer reaches the top of the list, I edit even more. There is always something I forgot to add, something that could have been said better, a sentence best followed by a code example or refinements based on comments.
While I usually refrain from editing other people's posts unless some glaring error remains after leaving a comment to point it out, I edit my own religiously. I've been nailed by the same thing a few times, actually I became rather upset the first time. I'm at 9k something now, I'd be well over 10k if I actually earned the rep from every up vote.
I really don't care about rep anymore. Well, sure I do care, but not to the point that I won't correct or add something to make my answer better, even if it means not seeing a number on a web page increment.
Due to having my site in my profile, I've actually received email regarding some of my answers, not just comments, especially on controversial topics. Make edits when you need to correct or augment something, even if it means your score at the top of the page doesn't increment as much as it would. The answer is what matters, if you care enough to edit in the first place.
Besides, you still earn badges.