HP Tuner!!! The learning curve is a bit steep, but once you get some basics down and follow some guides, it'* not that bad. It'* amazing what that tuner suite can do though! I'm amazed every time I look into it.
Since I have decided to go the HPT route. I am working on a plan to permanently install a PC in the trunk with the display on a control head like an avic f900bt or something like that. I think I might have posted that as an idea a while ago, but ditched it because of the BS involved. Now I am back to the BS. LOL