1) BigReactors - I will read up on the mod and do some testing, but I see no reason not to add this. Does this add new ore types? if so it will have to wait until a world regen (not likely).
2) Not sure I like this idea, we already have flans mod which adds things like helicopters.
3) I do not see the need for this, we have EnderIO which gives some nice basic generators that make a decent amount of RF, and later scale up to high energy.
4) I looked at this one a while back and decided to not add it as we have Iron chests which give the extra storage without being OP, once you exceed this you should look at digital storage using Applied Energestics 2, a simple ME Chest with power and a drive would do what you are asking.