This was 4 mics, but in the mix, I didn't really use the snare mic.
A CAD R11 in the kick, and two AT 4033's as overheads.
The 4033's were at either side of the kit facing in toward the snare, and about 5' off the ground.
I didn't phase reverse them because during a mono check of the overhead, I was losing all the low end in mono. You should ALWAYS check stereo micing in mono for phase problems. Mono is the only real way to tell if you have any phasing problems. If when you go to mono you lose a bunch of low end, then the mics need to be out of phase. Switch one and try again. Sometimes you may need to move the mics a bit to get it to work.
Anyway, 3 mics can work out pretty good if the mics are decent and you take some time to make sure they are placed right. You REALLY need to place them right in this situation because if say you have some annoying 7kHz on the cymbals, you could eq that out, but you would also be taking a lot of top end off the snare at the same time, which you MAY not want. You get the idea here?
Make sure your overhead are place right. I also suggest that you use large diaphram condensors in this situation. They pick up a "bigger" sound per se, and the transient response is very nice compared to small diaphrams.
Good luck.
Ed
Ed