That's the simple fact for all bloggers seeking to buy a custom domain for their blogs. What I mean by Custom domain is a url without .blogspot.com extension like mine www.oyedelejunks.blogspot.com . I'll soon buy up a custom domain for it like I did with www.uniloringist.com .
The reason why I support Godaddy.com as the best is for the singular fact that they have an option for automatic configuration of blogger dns settings. You just click click and wait for about 24 hours and your custom domain is live! Isn't that awesome considering the fact that guys are out there paying for this same free service. I really don't blame them, that settings is a bit hectic to configure even with all the Google tutorial about it.
Now, the steps are simple and won't take your time. First head out to godaddy.com and purchase that domain name you want for very cheap with coupons and then go to blogger.com and login to your blog settings. Go to the basic settings and you'll see Publishing. That's where everything about domain name is. Just click on "add a custom domain" and type in the name you've purchased with WWW. Then go ahead and click on the link below to automatically configure the dns settings.
Hope it works? Let me know in the comments.