I just wear 2 pairs of boxers and put a Readers box in between. Considering getting a Nutty Buddy with a proper jockstrap, as you really do have to protect your groinal region! Also wear Aero P2 Strippers, but planning to change (perhaps to Stretton Fox, if the price is right! ) as I find my box isn't always in place wearing this set up.
I use the Aero shorts and box, hardly even notice I'm wearing it sometimes. Really comfortable and doesn't hinder mobility.
just ordered compression shorts from 010gear that have the pouch for the box built in...if it works like its supposed to then that would be my choice for the rest of my life...obviously with a box inside