To edit again or not???

I'm deciding rather or not to pay to have my novel edited again before having it formatted so I can then finally upload it to Smashwords. I hear one can never edit too much because readers don't want to stumble over typos and other grammatical errors. But then, having another edit means another wait and more money. I just wanna get it out there but I want it to be good. Hummm still deciding...