Well, I can comment on 2 of them. I had a Futaba 4PL and sold it when I got on the RadiOpost team. The 4PL is very nice in your hand, light, easy to use and the cheapest to own. I also owned the Futaba 4PKS (pro version) and I would say for me the only difference I felt was not being able to position the wheel. The radiOpost is also very comfortable in hand and pretty easy to use. Not a fan of the twist screen or the color screen as it's not the easiest to see in sunlight.
Now with all of that said, I have made the switch back to the Futaba 4PL and won't switch again. The receivers are the cheapest out there and their service (if needed) is second to no one. There is no overheating issues with any of the 4PL recievers, there was with the earlier fasst recievers though. Unless you are a worlds driver, don't worry so much about the latency of the radio, but more of the feel.
I also had an MX11, nice radio, but this is where the "feel" comes into play...running 20 minute nitro mains felt like I was holding a 10 baby in my hand. Heaviest radio I have ever owned.
I hear you on the spectrum stuff...tried both the DX3S and DX3R and didn't like either.