What rear suspension to put on - cutting off the 8 bag

What rear set up do you all prefer and why.
My AG200 is in need of a rebuild and to convert it over and put bushings in I can just go buy a cut off with a million less miles on the diffs.
I was thinking low air leaf(ag400l) or flex air. I would kind of like to stay with a pac-car product just to make it a little easier when I gotta go to the dealer to get parts but there suggestions welcome.

 

I plan on cutting the frame and adding about 20"-25" to it in the process since my truck is kinda stubby at 240" right now. I can doit with just once splice with the cut off vs 2 with the normal stretch . The truck already turns terrible so may as well make it a little worse lol.

I look into the air liner too, I had that on my columbia before I sold it and for a 200" truck it didn't ride all that bad.

 

I actually just watched a video on youtube and it says the new AG400L (low low air) and the air liner actually use the same bushing in the front of the spring. I'm just doing research and saving some pennies right now as my truck as been kicking my butt with repairs lately. I am just putting in new sway bar pins in the front axle this weekend since they are only $175 a set compared to what its going to take to rebuild or replace it all.

One other thought is I've actually thought about putting a newer front axle on too, ive heard the newer W9's turn a fair amount better than the older ones like my 98 but ive never driven a newer one to know for sure and haven't been able to figure out the difference in the axles to see if one is wider etc etc.