Well, just from my experience. I noticed from previous drum recordings that i tend to not have enough stereo spread on the overheads when i get them on a homestereo or car stereo. Then when i listen to "professional" mixes the overheads usually sound pretty extreme in the stereo spread. However, im not really sure about this, and im going to be doing some experimenting with this this coming saturday. But this is what i feel, i think the stereo field should be as spread apart as you can get it with the overheads, as long as it is not deductive to the sound quality or have other problems associative. This will give much more distinct seperation within the individual drums. But thats all a matter of taste also.
I recommend recording some other stuff in the mix, like bass and guitar, and do a decent mix, then expirement and see how it sounds when you get it on a home stereo and stuff.
Darnold