I ended up going with the 396. I talked to someone at RevZilla who knew both the 595 and 396 well and walked me through a detailed comparison step-by-step. They have such great customer service. Apparently the 396 is a more modern unit, and it has caught up to the 595 in most ways by offering nearly all the features of the 595 minus a .7" wider screen and 3D topography. Not worth $300 more to me. Next up is ordering the TPM sensors with my RevZilla cash!