Keep it simple and clean.
I use MultiWall for setting my wallpapers, because with 2 screens with different resolutions you usualy have to edit a lot of pictures to get best results for setting as wallpapers. With MultiWall you can also set a wp-changer and some other things, I don't use.
I also use Rainmeterskins, because it is pretty easy to change, if you want to swap to a better fitting style.
Nevertheless
This Anon
>>6364466is right: There is already a desktop-thread, with general advice, ratings and a lot of Anons who can help you. See you there, then.