whats the best going price for the Edge Juice w/ attitude and where can i get it?

Also, im completely new to deisels, whats the best power/performance/MPG upgrades that i can do for my new truck
2005 Chevy 2500HD CC 4x4 Short Bed fully loaded...dont know what it matters, but sometimes it might.

Thanks in advance
Rich

Propane is the best for what you are looking for IMO. The programmers may give you a little boost in the mileage but when you get bit by that power bug you can't keep your foot out of it and down goes the mileage.