I played around with Reactor for breaking stuff. I used ProCutter for the pre-fracturing and it is a really cool tool! I also tested the script Fracture Voronoi and it works very good, but keep the number of pieces down to avoid crashes. However using ProCutter allows for more detail on the new inside geometry, but it is a little more labour behind it. Here is my result, captured directly from the viewport of 3ds max 2010.
Here is the tutorial that got me started; Reactor: Exploding an object part 1. It shows how to use ProCutter and Fracture in Reactor. Have fun and go nuts!