I say buy whatever lightbar you can get your hands on at a cheap price, that is at least 5htz, has changeable baud rate, can change Nema on, and has serial plug on it, and has the light arrangement which you think you can stand to watch to help guide you. As long as WAAS works well in your area. Rest does not matter in my mind. (Right outfit for auto-steer will be able to access for future steering use.) For auto-steer Think to the country where tractor driving auto steer originated, not talking airplanes. Then invision how your personal computer, fax, monitor, printer, cell phones, wireless stuff , and do your homework, the autosteer product is out there currently. You just probably have not seen it advertised. (How many different brands do you have in those home goods, probably many...I know I do. And I like the fact that not stuck to one company for any new age tech advance...you know the captive market effect if you have (JD or CNH) Yeah, I have a JD auto-steer, BIl had a Beeline for awhile, and Ole man has two Autofarm step-one's, Already converted the one on the Rogator, so as to have more features like contour, straight-line and auto-boom switching, maps. But if your an ole man and do not know much about computers better stick with the idiot proof stuff by OEM vendors is my atttitude.