i just started pouring myself, about 2 months ago. started with doit essentials plastic, it stinks and bubbles, switched to baitjunkys from baitplastics and it has been great, no bubbles and smells a TON less, baits are fairly soft without softener, but i would buy a bit of softener, too.
i bought my injector from lurecraft, the nozzle threads on, and its a nice injector, but if you are buying a dual injector to start, i would just buy the bass tackle, and use one of the injectors as a single if you arent making laminates.
so far i have molds from doit, basstackle and BTS, and they are all compatible with my injector (and i assume the basstackle as well).
i will say, be prepared to spend more than you think, i started with 2 molds (doit 3" cnc ripper and 3.5 ES ripper) and now have 6 (2 more from basstackle and 2 from BTS) and will likely be getting more in the near future, as well as a dual injector...its addicting!