I'm looking to get a programmer. Looking for something to correct the speedometer mostly, but also something that can unlock the cool features that my 14 JKUR can do. Maybe some features for when offroad. I know there are so many. Jscan, mini tazer, bully dog, edge and ect.... Anyone know which one can do what the others can't? I'm leaning towards the mini tazer, but have also heard that the jscan is useful too. What do you have and how do you like it? Please help.