A excellent choice to reduce the cost is to use a Simrad in the Go series; it's in the same cost range of a Elite Ti but the Simrad can be interface with the Lowrance or Simrad Nac-1. The Go serie comes in 5-7 & 9". It's a touch screen, chirp, wifi,bluetooth etc.. and yes the Navico AP Nac1 can run on you're boat .