Capita sells some quality boards for decent prices. Take a look at the Capita Space Metal Fantasy and Capita Saturnia.
If you are looking for reviews, check out shayboarder.com. It's written by a woman named Shay and her reviews of women's boards are by far the best I've found.
I would stay away from 5150. I never hear much about Rossignol boards, although I'm not sure why. The Diva Mag, however, is a well-regarded board.
I love Gnu and Never Summer, although their boards are pretty pricey.