Lake Maps - Which one?

Is this beneficial? Which should I get? How do I know if the lakes I fish are on here? Is my device compatible with these maps.

Money is not an issue, if it helps me as an angler, I'm ok with getting it.

Navionics vs Lake Maps vs etc.?

I fish Lake Mexia often but also Richland Chambers, Sam Rayburn, Toledo Bend, Lake Raven

Currently I have the Lowrance Elite 7.

Thanks!

Navionics and far as Toledo Bend goes none of the chips has much info on them.

Navionics and Lake Master are the two best out there.

Navionics for me.

Lakemaster won't work in your Lowrance, so the choice is easy... Navionics

Navionics