69289 ebook cover and banner

I need 2 ebook covers (web graphics) created, and two banners to promote them. Banners will incorporate the ebook cover created. Designer needs to know how to do high impact, impulsive designs that catch the eye and imagination. Concepts are supplied and possible images to use, but desginer needs to have stock images or be able to create images for the cover/banners. I am looking for sharp stuff, not run of the mill fuzzy, amature covers. You can use templates but the images and text must be crisp and the colors and impact appropriate. Again these are web images, to they need ot be fast loading and optimized, they are not for print. Please send me applicable links to smaples of simialr work. I need to see your banners and ebook cover work, not general design work such as templates. Thank you