I own a Tippmann 98 Custom, and they are very reliable guns for beginners. Many of my friends that play also own Customs, and they have no complaints about them.

http://www.tippmann.com/

Bob Long guns look very sleek and stylish, but they're probably too much for what you're after.

http://www.boblong.com/

Other companies are Dye, Kingman, Diablo, PCS, Brass Eagle, Eclipse, Odyssey.

Oh, yes, and the company that makes Angel's is WDP.

Just look around at an online store:

paintballgear.com, for example. I'm sure you'll find something you like that you can afford.