Dell Optiplex 790/990 Case Swap/Upgrade

Hi there,

I am currently in the process of building a budget gaming computer. I want to upgrade/swap the case on a Dell Optiplex 790/990 Full Tower. I would like to swap it to a modern ATX case with RGB lighting, USB 3.0, working front io, etc... What adapters would be needed for this process? I am assuming I would need a 3.0 Adapter but don't know what else would be needed to make it fully functional. 

Specs:

i5-2400

8GB RAM

1TB HDD

Wifi + Windows

DVD

Thanks in advance!