I absolutely love the sound of a good, large-diaphragm condenser mono overhead on drums. Adding a pair of stereo overheads to that always bummed me out, so I started using a ribbon alongside the mono to make an MS array over the drums. Fully mono-compatible (XY is NOT!!) and the ribbons give a smoothness to the stereo information while the center stays crisp and colorful. I've passed this on to friends and it always works!