You have a few options for tuners with dpf/egr off capabilities
-Minimaxx (Built in gauges)
-XRT Pro
-Spartan Phalanx (Built in gauges)
Or the new tuner on the block, Torque Technologies T1 (The T1 has a larger screen than the Minimaxx, more user friendly, same tuning and PID selection as the Minimaxx.. and cheaper!) or the Torque Technologies T2 (Comparable to the XRT Pro). I haven't heard any negative things about Torque Technologies yet...
http://torquetech.ca/
I personally haven't heard much about the Spartan tuners, I know a bunch of guys run them and are happy with them.
I'm personally going to run the Minimaxx in my 6.4 only because the Minimaxx is capable of custom tuning and I eventually plan on building my motor more so I will like more custom tuning.
Hope that helped.