Driveshaft concerns/questions

[Sport/Truck]

I was under the truck today (luckily) and noticed my center bearing is going out.
I'm wondering what direction I should take this project now, and would like pro's & con's for both one-piece or two-piece driveshafts.

The truck is lowered, but would like to lower it a bit more so it will equal a 4, 6 drop (no air bags).
I'm leaning towards a 700r4 or 200r4 trans for a future upgrade also.

The thing that bugs me about the two piece, is it seems built wrong with no sip yoke. And from what I remember reading here this is completely normal. (Probably why center bearing is going out?) So if I keep this setup I'd like some input as to how I can upgrade it to include a slip yoke.

So share your thoughts and Ideas to why one is better than the other.