My Advice,
Do Not buy the Honda Nav unit. Useless software and maps.
If you really want a off-market system, you can get a branded system easily for 35 - 45 K (Pioneer, Sony, Kenwood etc) which all are very reliable entertainment touch screen systems.
You also can get a navigation option available with them if you like at some additional cost. But only get it if you really need to navigate.
Do NOT buy cheap Chinese systems, they cost less, but you will be continuously visiting the vendor you bought them from.