Ok i got my venture yesterday used on ebay for 80 bucks shipped. Not a bad deal i feel but now that i am playing aroudn with it ive noticed the base map isnt very detailed. Its not even as detailed as the example pic from the website. Thier pic shows thats varous topo bars indicating elevation and other stuff. My unit shows the major highways, the ohio river, and the interstate but doesnt even show the two very large lakes in my area or any of the smaller rivers/creeks. Is this normal or just a setting? If this is normal that i am probably gonna sell and get the legend hcx so i can add free maps with a memory card for more detail. This unit is gonna be used for some deep forest 4 wheeling and i think things such as streams, lakes, and small roads are vital to gettting in and out from secluded areas. Any info appreaciated.