I'm pretty busy right now, but heres a link to site with loads of high resolution images of the Earth, and they also have cloud textures, as well as pre mad bump maps...

So check it out.... Here

I will be able to talk better later.

Ok! thanks for the earth images.:D

Updated
 

Ok! so now i took all of the suggestions, this time i was really care full about lights as well as textures.
so, what do you think?

and one more.

I was looking at my pics and realized, i need to fix it a bit, shadows...
any ways here is it.;)

Sorry for the big pic, it was 640 in my comp, don't know why is it that big in this site.