Yeah, I was also looking to be able to pull stronger after 6K rpms which is what led me to switch dp's after talking to my tuner. Even though I didn't really gain hp with the div w/g until Ed retuned it, I could tell the car pulled better after 6K than with the flat plate. The only thing you might have to watchout for is boost spike.
During the week that I drove on the div w/g before the retune, my boost guage was a little unsteady and would occasionally spike up to 18 psi but then quickly bounce back down to 16.5. Ed explained that the waste gate plays a big part in controlling boost which explained what was causing the spiking. As part of the retune Ed had to change my waste gate orifice to get the boost under control. If you do switch to a div w/g I would find out what size you may need to change your orifice to in order to compensate for the increased flow of the w/g gasses. Ed's a cool guy and I'm sure he'd be willing point you in the right direction with that.