I was using my MXL 603s for a long time as overheads. First as a space pair, but then I started finding good positions with the XY technique. With this I just had a seperate mic on the kik and snare. It sounds good to an extent, but I don't really dig how my cymbals (Zildjian A Customs) are translating on them and how the toms (Premier Artist Birch) sound like cardboard boxes through the OHs. I now started mikin' each drum seperately with various dynmaics (57's, an Audix OM, Beta58a, and a D112 on kik) and I'm using one overhead (C1) now. I feel that I'm getting much better results with this than I was with the 603s as overheads.
Just my experience.