Namecheap is a well renowned company (since 2001) with a rock solid reputation. I’ve moved all my domains from GoDaddy to NameCheap (flawless transfer by the way) for several reasons. Great support, actual reasonable prices (including renew prices!) and stability. They don’t offer anything spectacular or innovative although you get WhoisGuard for free for 1 year after registration. I recommend NameCheap to everyone looking for a domain provider.
Simple, streamlined and reasonable prices. Anything else?