In my option, there is no correct one for you. Just different fuel management systems that perform differently, but in the end do the same job. Of course manufactures and forum members will disagree, because they either want to sell their device or we all are convinced we made the right purchase. The cost varies according to the ease and use of the device. The most expensive is plug and ride and the others will require some programing by yourself. The programing is simple and the numbers are provided to you. If you have any fear of programing, go the expensive route. If you don't, save yourself a little money and buy one of the others. There are also some devices that have you bring them in to be dino'd by a tec. There are other programers out there by different companies that work very well also, so unless your convinced Cobra is for you, shop around. No matter what device you buy in the end you will hear " greatest device and gee I'm having problems with this device". Just don't make your expectations of this device to large and you won't be disappointed. Good Luck and welcome.