The rx that comes with the turnigy will not fit under the FC. Its pretty big. You will have to mount it somewhere else.

I think this is a pretty good deal for a camera/tx. You will also want some good antennas.

I have a friend that uses that OSD and he says it works great.

With the power filter, I am not much help. I don't use one and I haven't done much research on them, sorry!

I used 20mm clear heat shrink. Its pretty snug, but holds everything in there. If you are wanting to fit more stuff, go with the 25mm

I know its kind of a pain in the ass, but if you want to get your build list together I can take a look at it and make sure you are good to go.