My first choice for micing a cello would be a ribbon mic (coles or even one of the cheaper
chinese ones like the Golden age etc). Second would be the U87. The dynamic mics mentioned
won't sound right I don't think. The ribbon mic will give you a sound that will fit better
into a mix and the brighter LDC will give you a more detailed solo sound. Try to keep the
mic at least 3 or 4 feet away and parallel to the cello table as a starting point.