I second that about the amount of white used. I'm not keen on the brownish theme and the text in the header is very small. A new header would make a big positive difference in my opinion.
It looks nice, i just don't like the text next to the logo very much, it just seems small and harder to read
lol. Trust me, you do not want me designing anything for you (if you want to stay in business). I 'designed' my own website last year and thought it was great. Everyone told me they liked it...until my architect cousin told e the truth, i.e. that it looked awful and was actually damaging my business.