Can you be specific about the editing needs? I used to use ancient versions of Cool Edit Pro, Goldwave and Sound Forge. But ever since I started using Tracktion as my DAW in early 2000’s, I find the built in audio clip editor does everything I need it to do. The ability to drag VSTs directly onto the clip for non destructive editing is a really cool feature, drag over cross fading, one touch fades of linear, exponential and sigmoid types, etc. Inside the DAW. What is it you are needing?