-I chose the Sennheiser because it is essentially two shotgun mics rather than one, so it can pick up noise in a wider spread than your average shotgun. It also has great noise cancellation anywhere you're not facing the mic. It also has a high pass filter.
Exactly. It picks up noise in a wider spread. The whole point to a shotgun mic is that it has a narrow focus, so adding a second one to widen that field essentially defeats the purpose.
If you plan on using this at all for on-camera dialog, you are spending $400 on a useless microphone. Dialog is a mono source. Recording on-cam dialog with a stereo mic array can cause all sorts of headaches in post. Use a single, focused pickup pattern (shotgun, perhaps add a true hypercardioid for places where a shotgun doesn't behave). For that $400, you could get a decent shotgun kit based around the
AT-875, including a boom pole, lyre shockmount, and ample windscreening.
I'd also suggest going with the Tascam DR-60DmkII over the DR-05, especially if you go with the AT-875. You'll need XLR connection and phantom power.
And I don't see good, closed-back headphones on your list. How will you monitor sound?
-I went with the florescents that I did because I like the warmer look as opposed to LEDs which just kinda make everything whiter. Also I chose the forescents over any tungsten lights cause tungsten gets way too hot and consumes way too much power. The lights I chose only consume 55w but are equivalent to 500w tungstens.
Cheap fluorescent lights can have sickly color casts and can cause strobing in the images. Same can be said for cheap LED, but even cheap LED has come a long way. The Aputure Amaran lights are pretty dang solid.
I would double up on the 5-in-1 reflectors, and get a couple of stands and a couple of reflector holders to go with them.
And do you really need a drone and a gimbal at this point? Drones require licensing plus a buttload of practice to get right. The gimbal is the "everybody and their brother-in-law's third cousin" has one hot tool right now (aside from the drone) and is getting a little old to see in every video. But that's just my opinion. I do, though, see drones and gimbals as luxuries when the lighting and sound game are more important up front.