Scoots5012 wrote:
I good voice mic to use and one that would be the easiest to get your hands on would be the electrovoice RE-20.
If you don't feel like spending $700 to buy one for yourself, you could rent it.
On the low side I would use a Shure SM-58. Sure, as ZedSimon said, you can pick up a new one for about $100, but you can get a used one for about $75. --Trust me, you're going to want to remove the screen and foam from the inside of screen and boil them for about 10 minutes, and then dry them.
I'd recommend against an Elecrovoice RE-20 though, because of the expense, and what you can do with it. --If you need to spend $700 on a microphone, get an AKG C-414. It's a condenser mic that's a LOT more versatile than an RE-20. They also sell for about $700 new, but you can get a used one (Think EBay for used gear) for around $400-$500.
If you have a serious need to drop money on a mic though, go all the way and get a Neumann U-87 or a U-89. --You may be able to find a USED one for about $1500 or so. They sell new for around $3,000
Get yourself some decent software (Steinberg Cubase and Wavelab) a decent USB Mic Preamp and some decent monitoring and you can easily avoid spending big bucks on studio time. --The reason why I say this, is because the manager of a band that I once knew booked time in a big studio and ran up a $20,000 bill that they couldn't pay off to get the master tapes back, to release their CD. They resorted to burning off demo's of the sessions on a computer, and soon imploded.