Website redesign with content management system

My website needs redesigning. I need a content management system built in (not wordpress due to security vulnerability) so I can update it at leisure with new content and imagery.

I would like a more professional and clean looking site. References for this include:

Sknclinics.com
Silkslaserclinic.com

I also like the idea of having all content on one page like the following sites:

tom-jordan.co.uk
2.8hourslater.com

I'm happy to have off the shelf content management systems like or Drupal but the security vulnerability should be removed. Ideally a custom content management system would be best so there are no vulnerabilities.

I can supply logo and colour scheme (don't use the current one on the site) as well as portfolio graphics which are present on the site already. However all other imagery should be supplied with the redesign, stuff like the istockphoto style images that you see on silkslaserclinic.co.uk site.