craigb
If it sounds good to me, well, I'm not a pompous audiophile-type trying to impress anyone else anyway. 
When it comes to impressing people with audio quality? It will likely become one of those things that grandma's and grandpa's used to speak of...
I should state that I'm not a professional's jockstrap and only do hack-job mixing/mastering for friends. But I have noticed that when I try to present them with the final product, that the bands either don't want, or often aren't fussed with the stereo wav version. They just want the high-quality mp3. When I tell them, I put a copy of the full wav version on the CD or thumb drive? It is more often than not, met with a slightly puzzled look, followed by the question of, "Yeah but, you did make a 320 mp3 for us, right?"
I'm not sure if this means that people genuinely think mp3 quality is more than fine? Or if it is just another strand in the rich tapestry of musical subjectivity? Or indeed if it has to do with the hearing damage, that Bit referenced, a few posts back?