I do a lot of vocal recording and editing. I use Reaper for most of it, and for certain things like fixing p-pops, or little clicks, etc. I use an "external" audio editor, in my case, Adobe Audition. You can do just about anything you need to do in Reaper though. I have just gotten used to using an external editor and never un-learned. Of course there are lots of external editors these days that are less expensive that Adobe Audition, such as WavePad or even the free Audacity.
I've heard many people use Reaper and like it. I've used Cubase, Logic, Pro Tools and Reason. I'm happy wth the PT & Reason, but that's my personal preference.