Create PSD's for website - Design a Website Mockup

I’m looking for an expert in responsive design to create a number of pixel perfect PSD’s for every page of my website. I’m looking for a designer who can visualise the user experience and incorporate this into every aspect of the user interface. The design must be slick, modern, uncluttered with clear calls to action throughout and user experience should be valued above all else. Site speed is very important and this should be factored into the design aswell, so no excessive use of graphics that may hinder performance. I currently have no wireframes but can offer examples of other sites that I like. In the end however I’m looking for a designer who can take my vision away with them and create a design that meets my needs without me having to provide constant guidance. This is where the designer skills need to come into play!