I have been thinking about n13 (with disqus) for my site www.clap.com

But what makes this script better then rest (wordpress...) People have just told me use wordpress it's the biggest and best support.
I will also let users sign up so they can post on my site (i have to activate them and accept the post before it gets posted)
I will use a seperate script for my wiki (so 2 databases)
I have the design in .psd atm (for both sites) and thought it was cheaper if i use the wiki seperatly (2 databases)

What do you think i will also use ajax for the site. I also need to look at SEO point of view. :)