I just bought the AT2020 condenser mic and got a M-Audio preamp to go with it. I gotta say.. It's AMAZING for the price.. Picks up absolutely NO noise, but picks up the tiniest of vocals. Even when I'm whispering from half way across the room it picks it up clear.
I took a risk in buying it since I wasn't sure if it'd be good for VAing or not, but it really is. I haven't tried singing with it yet since I just got it yesterday, but I love it lots and lots.. ^-^ Can't beat the quality on it for the price. Got it on ebay for $80, got the preamp for $75.