Design a Website on Drupal

We are looking for a web designer with deep knowledge of Drupal. The site will be a news portal. Our graphic desingers will provide .psd files with distribution and color schemes. The job will require at least three different and complex templates. Design must be built upon Drupal blocks functionality. Two critical points to achieve are: speed in loading, compatibility with all browsers (including Mac specific browsers, like Safari, Firefox, etc.) All questions will be answered through the Project Clarification Board. We estimate the job can be done in 30/35 hours. We are looking for a proactive designer which works along with us, not only in providing what requested but also suggesting alternate/better ways to solve eventual problems. Being available through IM and capable of speak and understand Spanish will be a bonus.