Telerik provides a DNN HTML Provider that utilizes their editor. It even is capable of altering the web.config for you. All I did was change how files are stored (not much different than what Telerik provides so you shouldn't need that change). The only other changes I have are:
- Custom Tools Files (XML files that determine toolbars)
- Custom Tool File By Role (I changed the logic of the Telerik HTML Provider to determine which tool file to load based on the user's role).
Outside of that, what Telerik provides you should be what you need. I also use the Rad Menu on this site, which is just a custom skin object they provider. I am investigating what it takes to create a real menu provider so I can replace the module actions menu too.
BTW - Any other questions, don't hesitate to ask.