The most important point made here. Thanks Andy.andygabrys wrote: and really referencing against existing commercially successful stuff (whether it be production music from big libraries that is super high quality) or tv spots on Youtube, or commercially available songs on iTunes etc matters a whole lot more than what exactly you are listening on.
You can always make good decisions when you compare.
Not so much if you just listen to your piece in a vacuum.
It's so much more important to compare your mixes on any headphones to commercial mixes, especially in the "a la" area, than to try to predict or concern yourself with what a screener or A&R person will be using.
Casey