RE: Panupat's concern about performance.
I've heard this from some, not from others. And, I'm not surprised. I've not personally experience this, either locally or on US hosts. The very flexible architecture of Concrete5 means that you're simply doing more database access to render a page than many other cmses. So, it puts a pretty big load on the cpu in particular. A lot of hosts overload their systems to beyond capacity, and it's not a biggie for static or WordPress sites, but you'll see C5 slowdown on an overloaded system. You may need to go with a slightly higher priced host, but I'm sure you can find quality hosting at a fair price. The fact that these hosts also host xenForo is irrelevant, as this is likely a dedicated server configuration, so that is not a good measure of C5's performance.
In the latest version, the team put a lot of effort into performance. There are also a number of tweaks that can be made depending on your needs. C5 has run and does run some really high performance sites, so it is scalable.
Working with pages is so incredibly easy compared with Joomla! and WordPress. C5 was developed for web development, not the more restricted worlds of Joomla! for enewspapers and WordPress for blogs. A theme comes with multiple page template for various purposes -- full width pages, left sidebar, right sidebar, etc. So, your CSS can provide a consistent look and feel, while the various templates adapt themselves to your content. And, if that isn't enough, if you want to use multiple themes on a site, that's simple to do. If you want to test modifications on a theme, just install it in the user customized area and then add it in the backend -- the theme is totally independent of anything else.
What I truly like about C5 is that it gives the website developer a true development environment -- custom code is maintained separately from system code, there is a nice ready-to-use web development tool right out of the box, but the well-thought out structure allows customization at any level the developer is comfortable with.