When navigation item is in viewport, update the header menu bar
Make sure the top image is always 'almost' screen filling.  
When browsing through quotes update number of quotes in related span so that the user knows how many more there are (and where he is currently)
Show quotes/testimonials within jumbotron
Add logic so that each 'division' of the site is at screen height. So the experience is , regardless of window height the same.
Fix title of site, availability, etc.
more padding
better shadow for h1
better image for first jumbotron.
etc
This image fits quite well for a first jumbotron
these are images I do not use yet