Congrats on your site - looks good.
So personally I wouldn`t change the design.
As a 2 min job, lose any traffic leaks on your pages (just glanced at your main page and see your counter button at the footer).
Buying traffic is certainly an option but just be aware of what you are buying to ensure that it is highly targeted to your niche (ensure targeted text descriptions/banners are used with traffic that has a decent geo so U.S, UK, Canada in the main).