Harmy said:

Well, actually, the new version of SW will be quite different. I think I'll end up calling it v2.5 or something, as it won't be done from scratch like v2.0 was but it will have enough new/different stuff to be quite a different beast altogether.

If you don't call it v2.1 or v3.0, then the public is going to be confused where the missing versions are inbetween.

Unless you intend to release lots more versions, I would suggest v3.0 fits in well with the scheme so far for major releases as it's more than a bugfix for wonky audio (v2.1 would have been the audio corrected mkv).