I use both Wave editor and sample manager ( I got Sample manage before WE)
they are great
except for the lack of keyboard shortcut zoom feature...
very solid!
Only Mac based I believe?
Audacity does some weird adding of empty bits on any dither /SRC - on the end of tracks- however that may be a mac only issue - it just does not handle the 24- 16 or 48 to 44.1 change well
-Ian