by Alex Henderson\r Although Miles Davis' 1955-1957 quintet had a relatively short life, it went down in history as one of the finest and most interesting bebop combos of the 1950s. It was a group in which different musical personalities did more than coexist -- they complimented and inspired each other. The quintet's front line had two unlikely allies in Davis and the distinctive John Coltrane, whose aggressive, passionate tenor saxophone was quite a contrast to Davis' subtle, understated, cool-toned trumpet. Davis, who was Chet Baker's primary influence and defined cool jazz with his seminal Birth of the Cool sessions of 1949-1950, was a very economical player -- he didn't believe in notes for the sake of notes, whereas Coltrane's solos tended to be a lot longer. But as different as Davis' and Coltrane's musical personalities were, Miles Davis Quintet never failed to sound cohesive. Davis formed the famous group in 1955, hiring Coltr...