I remember it was a 15-pages long thread about whether or not powerfists on sarges (tactical, assault and devies) are necessary and worth the investment in the majority of cases. There was lots of pros and cons arguments but the general idea is that powerfist serves as insurance and IC and MC killer. Really interesting thread which helped me out a lot. I was kinda surprised that it wasn't stickied.
If you can't find it either, I can start another thread about pros and cons of powerfists in sarges.