For professional applications I'd recommend AGAINST the Snowball... intensely... It's lovely for podcasting, and as well for online/hobby work to get a nice sound. Unfortunately, for professional application it simply does not cut it...
If you want to check to see what suits your voice best -- try visiting your local music store, try out some of the gear, and then shop around for a better price.
My set up right now is a Studio Project C-1, and a Presonus AudioBox USB (pre-amp/external sound card)... It's a nice set up for a decent price that does the job adequately enough. However, I do intend to upgrade as soon as I can justify investing even more in to this than I already have...