Eye-Catching Poster Design Needed

I need a fresh, professional poster designed from scratch. The concept is open, so I’m relying on your creative input for layout, colours, and typography. Because I haven’t locked in a final size yet, please be comfortable proposing dimensions that suit both print and digital use, then adjusting once we settle on the best fit. What matters most is a visually striking result that will hold attention at a glance, reproduce crisply when printed, and remain legible when shared online. High-resolution imagery, balanced negative space, and clear hierarchy of information are key. Please include: • At least two initial concepts for review • One chosen concept refined through up to three revision rounds • Final, print-ready files (PDF/X-1a or similar) plus the editable source file (AI, PSD, or InDesign) Let me know your typical turnaround time and any questions you need answered before you dive in.