I am also looking to upgrade my finders, Lawrance has some really nice stuff on the market. For an extra couple hundred tho, I would go with and HDS 5 due to the abillity to upgrade and network. I think the HDS series will be around a long time. I can't see them packing any more tech into a fishfinder. I plan to get the HDS 5, then network it with a HDS 7 as a main unit. IMO that is. Happy hunting!