I prefer ribbon mics in the studio. I have two vintage Shure SM-33 mics from the early 60s. The nice thing about these is that the figure 8 pattern is reduced to a cardoid pattern through internal dampening. I've heard good things about the new CAD ribbons, but you have to be able to deal with the figure-8 pattern. For live performance, the Audio Technica ATM-35 is great. I believe Telarc recorded Ray Brown with this mic for some of the live trio cds. Another small mic that is overlooked is the original Shure SM-98. The best thing about these miniature mics is that you can place them closer to the body of the bass without them getting in the way. I rigged up a long miniature gooseneck with a clamp that attaches to the tailpiece. It gave me a great deal of flexibility in placing the mic.