Web Design - Make my site look professional

http://www.optmyroute.com

I am a launching a new software service to help service professionals optimize routing of their drivers. I'd love to build on this and expand to new services, but to start I need a crisp, clean, professional website design.

The site and functionality exist now --> http://www.optmyroute.com I encourage you to try it out so you can understand what the site does.

This site is targeted to very small business owners who have drivers or drive themselves. Examples:

An independent , freelance contractor who travels to several clients a day
A landscape mgmt company that employs 5 employees who service 150 customers per week
A home inspector who visits 50 homes per day.

The user of this service is trying to save on expenses and be as efficient as possible. They are attracted to the idea of using software like this but couldn't be bothered with complex software with lots of bells and whistles. They want a simple easy to use tool to help them with their business.

The site should look very professional, clean and crisp, not too busy. Please see the attached wireframes and use them as a guide. A logo already exists for the site but feel free to modify it if you want, or change up the colors.
NOTE: Please ensure this is original work. Submissions will be scanned to ensure they have not been copied from any existing sites. Thanks!

The winning design will have the following components.

- Home Page
- Drivers page & Customers page (where users enter the names and profiles of customers & drivers. The pages are basically the same, just one for drivers and one for customers)
- Solver page - where the user selects drivers and customers and runs the optimization.

The best way to understand how this works is to go to http://www.optmyroute.com, log in, save some locations and try the optimizer.

Here are examples of sites that I think have a nice crisp clean professional feel:

99designs.com (no surprise!)
betable.com
http://www.vazing.com// (a little too much text on the home page, but a good example of a company doing something similar)
http://www.aristanetworks.com/
http://www.nominum.com/
http://www.imperva.com/index.html

The files I will require are:
Web file format - .jpg and layered .psd (RGB)