I have to be honoust with you. I dont realy see a big design in your site. It looks like you gave a lot of attention to the content, but not realy to the design. From a graphical point of view I find the site quite borring.
Nowadays when you wanne make a difference, your site needs to be noticed. When people visit your site for the first time they will be shocked by the huge amount of text. Make sure you put the text in de readable blocks. When you scroll down a bit on your side, you dont see anymore to which part of the text your heading belongs to.
Also play a bit more with you typography. I wouldnt put the headers both in bold and italic, this is to much. Just make them font-weght: normal; and non-italic.
If you make a top image, realy give it some space (lets say 250px). This narrow pic you have now is a bit too narrow for the effect you gave it.
There is nothing to say about the navigation, thats quite clear. Maybe a home button?
Hope you dont take it personal, I think the base of the site is good, but you just need to develop it a bit more.
Good luck doing so.
http://www.csolutions.nl