I use the shure beta 58 and the 87. Both are great. The 87 is the best overall, but in a live setting, with a loud electric band, the 58 cuts through more. It has more balls is the best way to describe it. The Mids are exencuated. It's also cheaper than the 87.
As for a pre amp, I use those ART TPS tube pre Amps. I have had it for ten years or so, and I love it. I also use a DBX compressor, and a BBE sonic maximizer on my vocals. Finally, I run it through an Alesis midi verb 4 for some great plate reverb that I programmed off of a guide some engineer put online to get the best sound from these puppies. People that hear, and sing through my set up love it!