On a budget?
go with a pair of AT4041's (SDC version of the AT4040)
i use these in less than desirable rooms, or on stage. Otherwise i'll use omni's or ribbons.
8thstreet.com has the best deal on these...
You get a pair of AT4041's, cables, and a stereo bar for $449
http://www.8thstreet.com/product.asp...ry=Microphones
But if you have a fantastic room, omni's are the way to go.
And the best omni's south of a grand are the Avenson STO's ($500 for a pair)
http://www.mercenary.com/sto2microphone.html