I will give a shout out to my LHBS who also has a website
www.love2brew.com
They're as reasonably priced as anyone like Northern Brewer. I can't compare them to many others, but their kits are awesome and have very detailed instructions if you're new or just want a reminder. And of course the most important thing for me is the guys who own the place are awesome. Every time I've been there they've been more than welcoming, and they're incredibly fast at responding to emails.