Thoughts on factory replacement tachometer

[chev-obsession]

Hey Guys, I am in the process of rebuilding my gauge cluster for my ls swap. I have always liked the factory tach look. Mostly because it maintains factory looks and style, and seems to even the dash out and not have a blank spot front and center. However I've also heard they are more of an ornament and not very accurate.

So my questions:

Is it worth it to put in a factory replacement tach while I have the cluster apart to use the factory style tach to read engine rpm accuratly?

Will the factory style work with the ls engine since the ls engine is read digitaly?

Guys that have installed the factory style tach with an LS motor suggest going with a factory style tach or use something like an autometer?