Changing WP theme

I would lige to change the theme of my current blog: I am using the7 theme and would like to adsjust it like this example: [login to view URL] I have already sat up sandbox and made alot of changes, but need one to finetune everything. I need very responisve and fast theme, as the site needs to load under 3 seconds. If you have recomendations to use another theme, I would like to hear your opinion. Besides you must have experience with adsense, an help me place the ads in right places. I also need to create 1 logo for the website. Any SEO experience is very welcomme. This is a small job for an expert. And it shouldn't take more then few hours. I need only people with high proven results and 100% job completion rate, others please don't bid! You must be available on skype!