[Jimmyz123]

I have a Lowrance Mark 5X right now until my buddy is ready to give up his HDS 5. Learning how to dial in the FF is key to knowing what you are looking at. The boomeranges that you are speaking of, or arches is the fish finder setup without the FISH ID turned on. If you have the fish ID turned on then it will give you pictures of little fish. Most turn this feature off because it can and does limit what you are seeing. The arches you see are fish. Cabela's had the Mark 5X FF for $85 about a month ago and I bought one. I figure when my buddy is ready to give up the HDS 5 I'll have a back up system for taking on rental boats on lakes and such.

You can spend an arm and a leg on a unit but ask yourself where you will be fishing mostly and determine if you will need to spend $400 or more on a unit. Keep in mind though Bass Pro Shops offers 6 month pay options and that makes it a lot easier to get a more pricy system.