As I continue to explore more and more of the SoCal desert in my truck, I'm considering buying the Lowrance HDS-8m Baja GPS Chartplotter. The idea of pulling on the dirt, creating a waypoint, and taking off to go wherever i want, not having to worry about how to get back to my starting point is very appealing; as well as downloading trails and race courses to jump on (for non race weekends). My initial idea was to install it right where the factor head unit is, but my question is whether or not I should have a audio dealer install it or if I should take it to a race prep shop for the install? I don't want to do anything crazy and end up being talking into a full on custom dash or something like that. Although I know to a certain extent, the install would be considered "custom." Any ideas/suggestions? Anyone tried this before?