HCG....Excellent. I have the same unit, with the Bizer chip. Does a great job. Of course you need a chart. It is a must, but if out at night or caught in a rain storm the GPS is a great help at getting home. Slowly.....
Check out the Standard Horizon unit. At one time I believe it was the ONLY unit to use the chip. Not certain but I believe the i stands for internal antennae. There is also a unit that uses and external antennae. I think the external antenna is more adaptable if you are steering from a hardtop cabin.
I also have the optional fishfinder plug in. Does a fairly good job, but I use it more as a sounder.....
