I would look at the new Edge Evolution CS or CTS. The Edge units are new for the 01-05 trucks and have been working great. They both have the same programming so it basically comes down to which monitor you like the best. Feel free to give me a holler if you have any questions or would like a quote. We have a promotion going on Edge products right now.I have a lousy diablo now, but I'm wanting to upgrade. I'm looking towards an edge or bully dog, and am looking to spend 500-800 dollars. What can I get that is worth the money, and which is the best?