I noticed that your asking alot of questions on tuners and monitor/gauges. What it comes down to is personnel preference and bank account. The SCT is what works good for the 6.0. If you went to a Dodge or Duramax forum, you will find what runs best for them, but for the 6.0 it's the SCT with custom tunes.
I prefer to have analog gauges (7 gauges), and use the AE software. For the price,Edge insight CS/CTS or ScangageII will monitor every thing you need to watch plus more. Now it comes down to, do you want a fancy monitor like the EDGE, or just a basic read out like the ScangaugeII. This will also depend on how much money you want to spend.
Most prefer the EDGE for a monitor and the SCT X3 for the tuner.