I agree with the above posts, that for 95% of people the SAS is not needed. For me it was not needed, but I like messing with things that aren't broken. I have 0 regrets on doing the conversion, but if I couldn't do it I would not stop going out and having fun with the truck. When I bought my truck it needed all the front end maintenance from balljoints and all bushings to unit bearings and brakes. I just put that towards the sas and it made the decision easier for me. I actually researched for a long time on how to get the 8 lug ifs components in there, but couldn't find the info. If i could have done that, that is where I'd be. Go figure, that after the SAS, I found the info I needed.
On a 2500 suburban, you will probably never have a problem. I know the article on the red sled and do not agree with what they were doing with the truck. I could break a Dana 44 u-joint doing what they do. Doing a front dig in a 7000 lb truck sas or not is asking for it.