I'd recommend the Crawford AOS. Although it is a bit expensive, it does the job well and is much lower maintenance than the usual catch can setup. Also, in case you haven't researched, the Grimmspeed AOS is fine for a DD, but useless for any aggressive driving (e.g. autox).
Get a Peterson catch can, along with some fittings and hose and you are set. Its the same can Element tuning sells at a fraction of the price.