Northern brewer is great because they have a really good website. They are about even with Austinhomebrew but for a beginner I say stick with northern until you get the idea. The best bet is to start off by heading to Barnes and Noble and grab a home brew book. It gives you the idea of brewting which is quite simple.
Once you get to making larger batches use Austinhomebrew because they have $7 flat rate shipping and free shipping for orders over $100.
Good luck and welcome to the club,
Careful, its almost as addicting as getting a jeep.