High Quality Logo

We require a logo for a company. It needs to be very good quality – inspiring a ‘World Beating’ image. We would require 8 initial designs. If these were unsuitable we would require another 8 and so on. Once we found one we liked we would need unlimited revisions. If the work is of a good standard we would have more jobs – maybe 1 – 5 a month. Please only bid if you can show me examples of logos – preferably a project that you have developed from concept to complete logo. Logo would need to be in PSD, JPG & Gif and possibly AI. Thanks!