I could not be more impressed with the Semiologic Theme
I am using the Semiologic 4.0 (beta) theme by Denis de Bernardy on this blog
This theme comes with several plugins and the author has several more for it that really make it easy to work with. The theme has four skins that allow you to change the look of the site almost like changing a theme, but keeping the same format. There is also an easy way to choose a font family for the blog without having to learn CSS or figuring out how to change the styles. This makes it very easy to use if you are new to blogging and do not know how the code stuff works.
The Semiologic theme makes it easy to customize many things
Captions, under the Presentation menu allows you to change things on the blog like the "more’ when you want to shorten a post on the main page. I have changed it to "there is more to this post." You can place several links at the top like a regular web site (I just have a the Home link up now).
What about the Semiologic Pro Theme?
I do not have the Semilogic Pro theme but many of its features show as disabled in the regular Semiologic theme
The Semiologic Pro theme has several more options for the format of the blog. There is a flexible format also that will adjust to the users browser size better. I have found that this format works well at most of the sizes I have seen but the flexible format should work even better.
The Semilogic Pro Theme has a Features submenu under the WordPress presentation menu
These options are disabled in the regular theme. These features provide push button access to many plugins or features that you would probably end up downloading from other sources. There is also a feature called SEO for search engine optimization. With the great job I find with the regular Semilogic Theme on SEO, my guess is it should work awesome. There is also an enhanced Wysiwyg editor among many features.
Denis de Bernardy has done a really good job with the Semilogic themes
It seems to be well written. It really does a great job. It make the blog very easy to use. I plan to try this theme on some other blogs I may develop.
What if you want a unique look to your blog?
I am not completely sure yet. You can learn to make your own skins. I believe this is done with the CSS. If you really want a totally unique site this may not be for you. I personally think that a good theme that provides the content clearly to the viewer is more important than a completely unique theme.
Is the Semilogic Pro theme worth the price?
If time is more important to you than money, yes. The Semilogic Pro theme seem to be designed for the new business blogger, who is using a blog to promote another business. The Semiologic Pro theme takes all the time of setting up the blog and makes it push button easy. It has improved SEO features and other features that I think will make it a good investment. Denis de Bernardy also provides more support for the Pro theme vs. the regular Semiologic theme. This all makes it valuable to someone that just needs a good blogging platform and does not want to spend time hunting down plugins and setting up the blog. You can still do as much customizing as you can with any other theme.
If you are unsure about the Semilogic Pro theme download the regular theme and see how it works
You will be able to see the features that are disabled and decide they are worth the price. I think you will like it. No theme will ever be perfect, but the Semilogic themes are a great way to run a blog.