That is probably a little too open ended of a question to get a lot of replies. I just started printing DC so I spent a few hours searching the forum for posts using general terms like discharge, emulsion and dc ink (reading everything that Tonypep posts can't hurt!). After I had read through some of these posts I searched for the names of products I was considering. Finally, I went to the manufacturers websites to download instructions and MDS sheets. That is how I was able to decide on what products I was going to use. I had printed waterbase inks before so it wasn't a totally new experience. You might just search for waterbase, because tricks like misting your screens, squeegee angles and pressure, clean up and the like are relatively universal between WBb and DC (non plasticharge versions).
If you can find a local shop that uses DC see if you can check it out. The smel of ZFS systems is what kept me away from DC for this long. I'm printing at home right now and the wifey wasn't going to go with offensive odors.