As already noted, a GPS will work on either the 436HP or SDS100. (The cables used are different, though if you purchased Uniden's current 'GPS kit', it includes the cables for all of the scanners that can use a GPS.Awesome info. Thank you. I’m trying to compare radios and was also looking at the SDS100. We do a fair amount f traveling and thought the GPS feature would be nice, but didn’t know that could be done with the 486.
Basic programming for the 436HP as well as the SDS100 is exactly the same. A Favorites list created for the 436HP will also work in the SDS100. The reverse (an SDS100 file into a 436HP) is also true, You do have a couple of features on the SDS100 that do not exist on the 436HP, such as entering a "Site NAC" or using the filters, but that file will still work in a 436HP. While a 436HP file may not have the site NAC or filters, it will still load & run in an SDS100 without having to 'fill in the blanks' on those items.
At present, you don't have simulcast in your immediate area, and your county, for now, is not on a trunked system. Should that change in the future (switching to a trunked system which could utilize a Simulcast site), then the SDS100 would be a better choice than the 436HP. The SDS would also be the better choice if you are traveling to or through a large metro area, such as San Antonio or Austin, or here in the DFW area. Most any large metro area you can think of, not just in Texas, is likely to have at least some simulcast sites.