I'm with Fletcher on everything he said. Aim a 57 at the floor or the opposite wall away from the drums, smash the shit out of it, and who cares about keeping it panned center? The best part about smashing a mono room mic and keeping it in the middle is the cymbal wash doesn't float around the sides and mess up your overheads. I tend to use the AEA R84 in front of the kit and sometimes for effect I'll smash it and keep it in mono. I makes my kick and snare feel better and my cymbals still have plenty of definition in terms of space and panning. The R84 is also an awesome ribbon with a night soft top and really great mids and low end, so it makes an incredible front-of-kit mic or room mic.