Definitely go separate. Go BH Photo for the P2 and H3-3D Gimbal, batteries and case (HPRC 2700PHA case is BAD A$$). Their return process is no frills and I trust them from years of previous experience. I went to Range Video for the Black Pearl (cheapest I have found) and antennas and Atlanta Hobby for the ImmersionRC transmitter and quick release prop guards. Grabbed the 3D printed monitor mount from Rave. I don't like to solder so I picked up the plug and play wiring from
http://www.firstpersonview.com/cables/p ... ransmitter.
I also added valuable personal property scheduling through USAA ($58 for $2300 coverage, no deductible) and joined Academy of Model Aeronautics for some liability coverage and general education/support of the overall community. Hope this helps.