Banners for affiliate marketing

We are looking for high quality banner design for use of advertising our media and information website. The banner sizes are: 120 x 60 125 x 125 120 x 90 120 x 240 120 x 600 728 x 90 468 x 60 300 x 250 160 x 600 180 x 150 Please only make a bid if you have an understanding of how to design banners, comprehensive understanding of space, white space, color and alignment. These need to be of the best quality but affordable.