Theme recommendations (Full width header, not large, no sidebar)

As the title says, I’m hoping to find some theme recommendations.

Ideally –

1) No sidebar (or at least with the possibility to remove it)
2) Full-width header, but not large. No taller than.. say.. 500px and would reach across the full length of the page
3) Responsive
4) Doesn’t feature any buttons in the header
5) Preferably a lot of options for playing around with the colour scheme

I’ve been trying to find a theme that matches this, but it’s proving quite difficult.