Well I pulled the trigger today and ordered the falcon f16v3, differential expansion board, and 4 4-string differential receivers. Looking at my options it was the most bang for my buck. My biggest worry with the f16v3 was the wires all across the yard, but with the 4-string boards, that will only be the cat5 to the prop areas. Spent a little more than I was going to for this year, but should cover my expansion of pixels next year and won't have to buy more controllers.