I like the lowrance HDS8 & 10, if you are going to get structurescan unit, the HDS8 & 10 can split its sceen four way so you can view structurescan, down imaging, gps and color sonar at the same time. The lowrance unit has three (3) crystals and the humminbird only has two (2) which make the lowrance a digital unit and the humminbird anolog unit, so the lowrance unit will have better picture clarity. When I pick-up my new boat at BassCats factor, the sale rep I dealt with had just put a HDS8 on his boat, he use a Humminbird before he put this unit on his boat and told me he was using a jigging spoon in 110 feet of water and could see it on the sceen where he couldn't on the humminbird. Both are good unit but I like the HDS unit better, I have a HDS8 in the dash and HDS10 on the bow of my boat.

Gary