Versatile Website Development Needed

I’m ready to build a new website from the ground up but haven’t locked in the exact platform, structure, or feature set yet. What I do know is that I need a clean, modern site that looks great on every screen, loads quickly, and can grow with my business... (Budget: $1500 - $3000 USD, Jobs: CMS, Drupal, Graphic Design, HTML, Joomla, PHP, Web Development, Website Design)