Do you know of any program that (or iTunes etc plugin) for Mac that helps me trim my MP3 colllection?

I have Gb and Gb of stuff that nowadays I consider junk but among those are some that I’d like to preserve. I’d like to have a program in which I could listen a bit, click a hotkey and the song would be trashed (with possibility of recovery), and automatically the next song would play, starting at 45 seconds for example. Then I could easily trash a whole batch of MP3 without having to do a lot of key combinations and/or mouse clicks.