In terms of layout and graphics, i think this is one of the most sleek sites i've seen. In most cases designers fail to accomplish to merge grey with predominant white and manage to look almost elite.
Since we're talking design, i wouldn't change anything, just get a more "diamond" shimmering effect on your frontpage. Not a diamond in terms of visual, but the diamond "glare" or sparkle, if you will. Your site is already looking very well, i think that may be worth a shot.
The site navigates with ease and intuition. Nothing to add or change there.
Your pricing is a bit steep for my taste, but that's personal preference and certainly doesn't stand to discussion here. However, you're somewhat taking away from the financial pain by offering "built in" services such as SEO, hosting, etc.
While all tabs are functional, the PRICES (shouldn't it be Prizes?) is inactive. I assume it's a tab to demo design competitions that you've won, however since there currently no awards to present, i'd remove the tab. It creates the impression that, well...that you haven't won any awards. Bring the tab back when there are prizes to demo. Also, would you think it makes more sense to rename the tab to "Awards"? If i'm totally off track with the prize/award thought, discard it.
When you present your work, unless you don't have current clients or even past clients for that matter, yes - you should present banners and such with your company name on it. As soon as there are clients, take YOUR banners off and replace them. In the consumers mind, i'd rather see something that is existing, already gains customer awareness for your client and is a testimony of your success. Same goes for the logos, you're presenting one company "EPS", get some variety on display. It's not enough to just present EPS in different shapes and variation. For a prospective client, i want to see your portfolio rather than different layouts for one company. EPS is obviously a technical company, if i'm a grocery store, plumbing outfit, Car dealership, etc. i won't be able to really connect with your logos.
These are just minor modifications, nothing big time and should be easy and quickly to accomplish.
Overall, i like the stellar, clean and almost shiny look of the site.
It's a :tu: