Lines of DG and which is the best?

Lately ive seen many people working on this project and i want to jump into the project but im wondering
how many lines of DG are out there? And which one do you think is the best?
i want to invest in a good DG visual..
thanks for your time!

The Bell line is the original. You can get them directly from the source at Reptmart (http://www.reptmart.com/).