BNC Fashion v1.0 is exclusively available for use with Blogger templates. This beautifully simple theme includes a two column layout for your widgets and advertisements, integrated RSS feed icon and stylized icons for post meta data. Enjoy it for free
blogspot theme is out their millions in google search. i dont prefer blogspot now cuz it is not easy for SEO
Blogger may be better for personal use and if you want to integrate your blog with a host of Google applications but for business purpose, Wordpress is better as it is an OSS and is constantly updated. Even if you buy a domain name on blogger, it will not look as professional as Wordpress.
Professional includes both, the content and the templates. The first impression about a blog is created by its design and so it is very important to have it in tune with the theme if your blog. if "Professional" is only content, then people might as well just go for blank templates, but that rarely happens. I am talking about the appeal to humans, not engine (which is important and can be managed too).