The Samson Meteor packs a pretty chrome punch as an inexpensive, portable studio mic. The downsides? It tends to pick up a LOT of background noise (you're gonna want to cup this one, folks!) and, the USB cable is in quite possibly the worst place- straight out the back at a 90 degree angle, ripe to be jostled and disconnected. Pop filter recommended but not necessary for this beastie.
I bought this to improve upon the quality of my macbook pro's built-in microphone and was glad I did. It's super portable too, and for the money, I have zero complaints.