Lowrance SD cards

Question
I have a lowrance 4800 and ifinder handheld. I'm confused on the best way to get detailed maps of lakes and which is best (navtrinics etc.)  Will any give details of lakes and roads.  Primary interested in lake of Ill an d Mo. Mapcreate is another option but no where tells if it has topo of lakes.Would appreciate what your opinion is. Would like the eaisest and of course cheapest.Thanks for any info you can give me am a novice at these GPS.  Jim

Answer
Jim,
Maptech, Navtech are good map suppliers, you may also want to look up GPS map software. being that the GPS unit that you have is a handheld it limits what maps are available to up load into the unit. As for details on roads and lakes, I have seen some maps for GPS units that will show fine details of roads including street signs,gas stations etc.

TOM,
T&D ELECTRONICS
[email protected]