An infinite Avant Window Navigator AWN dock themes collections looks amazing with different styles ” Lucido, Floaty, Edgy, Curved, 3D, and Flat style”. Also you might want to check Part 1 and Part 2 AWN themes.
How to install Avant Window Navigator AWN Theme
Run AWN settings then go to Themes tab then install button and select .tgz file.
Another way for installing theme
Extract .tgz file then paste it to this path