It's a shame that Adobe doesn't have a Mac version of Audition. Syntrillium wrote the original code for the software and Adobe's probably just been expanding on that code base, which I'm guessing is not very portable. They'd probably have to do a complete rewrite to bring it over to the Mac.
Logic Express does have a sample editor (
http://www.scottallyn.com/images/le-sample-editor.png), so Logic Pro probably has it, too. it works well enough for cutting and splicing. 'Not real pleased with the noise reduction, tho.