About the only option is to go with the LakeVu HD or the LakeVu HD Ultra. The contour lines on the Garmin HD mapping is great. You can also add Fishing Hot Spots Pro to give the mapping more detail (road beds, creek channels, and such). I'm actually about to add the Hot Spots to mine.
That's what I'm looking for. It has lake vu already on it, and i love the contour lines it shows, however I really need to be able to see the creek and river channels, I follow them a lot this time of year, and it doesn't show them at all.
Is that fishing hot spots pro a sd card?