The more mics you have, the more phase problems you will have. If you really know what you're doing, a gazillion mics can help get a huge killer sound. However, if you're just starting out, you may want to do a search on recorderman's minimalist mic technique for drums. It's simple, counterintuitive, but yields really nice drum sounds.
In a nutshell: put a nice condensor mic (say, an SM-81 for example) exactly two drumstick's length above the middle of the snaredrum. Put another condensor mic just over the drummer's right shoulder, pointing down at the snare. It too should be two drumstick's length in distance from the snare center. Put a nice dynamic mic in the kick drum a few inches off the batter head, preferably something with a nice round low-end like an AKG 112.
I was amazed at how round full and fully in phase this approach is. I am starting to use it with great success, although I usually stick an undersnare mic into things as well, for added crispness. Unless your drummer is totally nutso, you won't hit these mics inadvertently.
And oh, yes, the comments about drum tuning are gospel. A good kit, in a nice room, tuned expertly, played by a good player, into good mics, that are well positioned, fed into a nice preamp, into a nice A/D converter is the ticket.
Good Luck!
