FX-R stage 3 or 4?

So i am thinking about doing the retrofit bi-xenon projectors on my stock lights. I currently have some 2nd gen. ccfl projectors from Anzo and would like to get more light output and a better beam pattern. I am in the process of doing the bhlm and figured i might as well do this mod. while i have them apart. My question is what would be the best kit from TRS to go with? The fx-r stage 3 or 4? Gatling shrouds or something else? Any tips or opinions are appreciated. Thanks

 

Well, I searched and this thread came up... I'm in the same position, after looking at the retrofit source's website, I can't see any advantage to the Stage 4 kit vs the Stage 3 other than a higher price tag. Am I missing something, is the stage 4 kit worth it?

 

A quick look makes it seem like only Ballasts, which are easy to swap later.
Check out my retro thread and the threads referenced in it.
GL!