Hi. It looks very slick, not completely convinced about all the photos, some are very bright, others are very dark, gives an uneven appearance. I would say, though, that I don't get why you have all your styles in the web page, and why there is so much javascript. There is virtually no content for google to find you, and even if there were its so far down the page that the spiders would give up and go away before they found it. May be that's not important, but it will help your page to load quicker.
I don't know about bigblackbag offering 'standard compliant' web pages, checked your home page and guess - 259 Errors, 155 warning(s) for xhtml. Even checking HTML5 or HTML4 still gives 150+ errors. Not sure how that squares with "Our portfolio websites use standards compliant HTML making all your content highly visible to search engines which translates into customers."