Just Steve sent me a text, to get on here and help out.

I had HB for years, swore I would never change, and the boat I bought came with Lowrance, and I now have Lowrance, but I often miss some of the features on my Birds.

That said, without knowing exactly what you are fishing for, I will exclude the Great Lakes, as we are in a Crappie Forum, vs a Big Lake Forum.
I'm going to use my powers of my Ancestral Pollocks, and say your looking for more inland lakes.


You can get the Great Lakes, which cover Indiana, Michigan, Ohio,
Link Here: Lake List - LakeMaster Great Lakes 4.0 (johnsonoutdoors.com)

If your graph supports aerial imagery, get the Great Lakes PLUS. I however have never really seen a need for aerial imagery while fishing. So you can probably get the standard, if you are only looking at those two map cards. Plus Map Card Link: Lake List - LakeMaster Plus Great Lakes 2.0 (johnsonoutdoors.com)

If you are truly going to go Michigan only, they have a Lake Master Michigan -v2 that would work very well. Complete list can be found in the following link, and includes, Lake St Clair, Detroit River, St Clair River, Saginaw Bay, & all connecting Great Lakes to Michigan. However its listed as a "Previous Edition" and I am not sure if it can be purchased instore now.
Link: HB_MIV2_LakeList.indd (humminbird.com)

Of the three, I like the Lake Master Lake Michigan - 2, but if its no longer available, go with the standard, I see no need for aerial photograph, etc

Here is what is added to the Lake Master Plus, over the standard.

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LAKEMASTER PLUS


For an added angling advantage, opt for Humminbird LakeMaster PLUS. These maps include all of the features of LakeMaster with one key addition: aerial photography of high definition lakes, providing visibility to docks, buildings, and structure. You also get the choice of how you view the aerial imagery:
AERIAL ONLY - Satellite view over all land and water, no map data
LAND AERIAL + LAKEMASTER MAP - Satellite over land surrounding lake, LakeMaster map on water area
FULL AERIAL + CONTOURS OVERLAY - Satellite over land and water, contour data overlay on water