Does your mixer have phantom power? If so, don't bother buying a decent pre-amp, spend the extra on a nice vocal condensor. I'm not sure what's the best, not sure on your budget? I have an SE2200 which I like on vocals, but it's a budget mic.
You need a pop shield, but you can make one from tights and a coathanger (I have two proper ones, but my coathange is easier to use).
sh*t loads of compression on the channel in SX, low pass at 50Hz or so (incase of rumbling), you might want to boost the presence around 2Khz, add distortion (I LOVE the quadrafuzz plugin you get with SX), reverb etc.
EDIT: But i'm not an expert, just trying to help