I think your site has an individual style. I am also a freelancer and think that you are doing the right things to market yourself although your location is not necessary in your ad. You are stating that you work all over the country so there is no need to mention your location as it will put more people off than will contact you.
If you want the bigger work then you have to put your money where your mouth is. I try and give out honest advice on forums like these to help other people. I do not aim for world wide web domination as I only work by myself with the help of a few freelancers who can do the tricks that I can't.
I find that google adwords is good, but it is not for the faint hearted. This allows me to get better paid work although it is quite high risk high reward.
Send me a pm if you want more advice on getting your services known - I am not claiming to be an expert but I do have to turn down work occasionally due to workload.
