Poly Cab Bushings VS New GMT Upgrade

[Kamd90Chevy]

hey guys and gals, its been a long while since i have been on, but family and finances put my dearest Abbigail in the garage and sitting for a while. Now that things are moving along again, i'm due for replacing the cab bushings as the rear of the cab is finally starting to sag enough to notice the body lines not matching as they should. i remember a while back there was a thread where someone step by step upgraded to newer GMT bushings. My question is, has anyone compared the pros and cons of altering the cab to do so. I have the ability to replace with upgraded factory style or to go ahead and do the newer style bushings. But before i decide, i would love to hear from everyone about their opinions.

Thanks everyone
Daniel