Hello!
Glad you like our templates! To answer your question:
All of our templates are developed according to strict
web 2.0,
Valid CSS and
XHTML standards -
that being said - the main content area and modular areas should not have any structural issues with any third party components and modules. On top of that, our CSS is designed in a way to not conflict with third party components and modules. So - it should all be fine!
There is one point I have to make clear though - as other components and modules have there own CSS and coding, there
could be conflicts between that and our templates, as we have no control over other components and modules CSS and code, we
cannot guarantee that there will not be issues.
The good news is - if you find an issue with say virtuemart and out templates -
and we find it is an issue in the template from our side - we will sort it out for you, and re-package the template with the fixed changes.
In a nutshell, I would say, go for it!

Hope that helps, cheers...
Lumo