The only reason I brought it up was the other options will increase dps/threat, which doesn't seem as important after going through the powertech tree. Survivability even as little as 3% would provide just seemed more ideal. Unless I'm underestimating the amount of threat that will be generated. At which point I could definitely see how 3 points in dps talents would be better.

I was working on my build and what I have is almost identical to what you post. My only question is why did you not go for Intergrated Cardio Package (3/3 gives +3% endurance). I'd think as a tank you'd want to get the extra health rather than increased damage. I'd assume you are able to hold threat with what you have already. As for what I dropped it was Prototype cylinders and Iron Fists. Build is below. http://www.torhead.com/skill-calc#301G0GrdorogzZMcbZ0c.1 Note: Observations are based on WoW experience.