if i had to choose between the 3 i guess i would have to say malmsteen his music is much more catchy than vai and satch , i also think them 2 are about the most overrated guitar players out there , i mean dont get me wrong there both bad ass guitar players its just that there music is very boring i went out and bought every vai album, and he does not impress me that much , i much more impressed with zakk wyldes playing than vai and satch, and as for speed none of these guitar players are faster than the other , its just what there playing and how there playing it to make it sound fast , music can me a illusion sometimes and some guitarists know how to use that to there advantage, but zakk wylde is the fu#kin man and he could kick malmsteen, vai and satches ass anyday

peace