Logo is nice, however, Giants doesn't really fit with 2013...
I just do not know why you have to declare that your company has only been around for five months.
This was my first thought, even before I clicked the link.
I also feel like I'm leaving your site when I go to different pages. On the main page, a modern, dark, grunge look with a textured background. Not a bad aesthetic, but then on the Work page: flat with black on white. Also not a bad aesthetic, and then onto the Blog: I'm suddenly on a cartoony, illustrative site. Pretty good illustration, too I might add. But then on the contact page, flat, chunky.
They're all good designs in themselves, but with only the logo tying them together, you're straying too far. I'm sure you're just trying to show your range of abilities, but save that for your portfolio page. In fact, that'd be a great place to park your alternate designs.