If he has a GVWR of 7300 then he has the 5.4L 4x4 and that has a hitch load of 800lbs, so he is in spec for the TV but on the high end. I would lean towards the integrated sway control system myself on this setup.
However, if I had the Curt I might try adding two friction bars knowing I was risking 150.00 and that the back up plan would be to move to an integrated system if I did not like the setup.
Keep in mind that you do have to drop the bars to maneuver the TT in tight spots or backup, something that you do not have to deal with on an integrated system like the equalizer.
2011 GMC 3500HD 4x4 Crew DRW Duramax
2012 Sierra 365SAQ
2006 Police Roadking FLHPi