This is one nice site, Spinny!
I particularly like your choice of color schemes, and the way you have managed to make gradients and transitions really work for you.
A minimum of color clashes, which are so common elsewhere on the web.
The gradient-transitions of your menu button colors, into the black background below, are very well made!
The only thing that gives me slight pause, would be the backing-background (if you know what I mean!), consisting of beveled blocks in various earth tones. To me, the "busy-ness" of that background clashes with - and draws attention away from - your very clean and serene-looking main viewing area. That is of course just my particular reaction, which may be representative only for a tiny minority of your visitors!
So, in summary: Congratulations on building a site that is very pleasing to the eye!