I know atleast one of the factory sealed ujoints in my truck's rear driveshaft needs replacing....and I do not want to replace just one and have a band-aid fix

My truck is a long bed truck, with a 4.5" lift and 37" tires

What is my best option?
1) Install all new greaseable ujoints and replace the carrier bearing with a new unit

OR

2) Replace the current setup with a one piece rear driveshaft


I found a heavy duty carrier bearing, which I believe is made for the C&C 4500/5500 series trucks. Spicer #210391-1x

I also read there's a heavy-duty urethane-cored carrier bearing available to fit from the OTR sector... they run ~$180 (not sure of the part #).

I read somewhere that lifted trucks won't benefit ( too much bind ) from the one peice shaft, hard to get balanced and stay balanced.

I heard the one piece puts the more stress on the trans case and differential than on u joints.

Any input or suggestions?