I saw this post and although it's old it still comes up high on Google. I thought I'd give a quick warning to the community. DON'T BUY REDACTOR. They charge you $100 per site, but they quickly switch versions on you and ask you to buy it again (not even upgrade, you have to pay full price again). I think their multi-website price used to be $1500, and then they lowered it to $300. I was suspicious, but heck I bought it. Short time after they "upgraded" to a new version and discontinued the old one. Now I'm stuck with this editor on multiple sites and I can't even upgrade jQuery or the editor will stop working. I asked them if they have a fix for it, Art from Imperavi redactor responded to me saying that not only will they not fix it, because it's an older version, but also admitted that they're planning to discontinue the current version and then the version after that. So if you get redactor, there's a chance that your editor might be outdated tomorrow and you'll have to pay another $300 or more to get it working again.
