Honestly; I think it's a tossup. I purchased the base unit (without insight), and then bought the nav chip. It works great.
I was on someone elses boat and they have insight but no chip. It appears to work great also. He said he thinks the insight "refreshes" quicker than the chip, but I can't confirm.
If I was going to do it over again, I would probably buy it with insight, and if I was disapointed with insight, I would buy the chip at a later date.
Hope this helps. Save up some money for the sidescan/downscan
; it is awesome.
5th (Marty)