I'm going to go agaist the grain on this one. For me, the SM-58 was never a good mic. My voice is too deep and too soft for that particular mic. However, the Samson Q7, which sells for under $70 has been superb for handheld mic usage, not only for me, but for a lot of others on this and many other forums.
Whatever mic you decide upon, make sure the outlett selling it has a liberal return policy so you can return it in a reasonable time if the sound is not what you're looking for.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)