Soundforge has great zoom functions, and has quite an accurate editor, especially in how easy it is to select very specific passages and how you can re-adjust the selection. However, it's destructive editing. I still don't like the plug-in chain. It's very old-school and out of date.
With Mastering, for the money, Wavelab is the best I've used. It's specifically designed for Mastering and editing, although I use it primarily for dressing up the head and tails of a Mix and then processing in real-time. The workflow is good. Metering is a must have.