Yep the 50/200 on the 1kw. I was thinking the same as what you said. thank's!I'm assuming you are going with 50/200 on the 1kw. I don't know the Lowrance but just talking frequencies if it were me I'd go with the 83/200. Run the 50 for your deeper stuff but at the same time maybe get some better resolution on the 83 for some of your deeper work. Then whatever machine you want to run the 200. The 83 would be just another added tool. Who knows you might be surprised the 83 could be that magical frequency. Commercially I've found 120 to be the magic one for certain fish (sole). It starts to fade at around 120 fathoms or so which by then we start to rely on our 38. I'm actually surprised at the 120 when we get in shallow I was thinking our 200 would start to show more but the 120 seems to show better or it's just me adjusting the machine but I've played with it a lot for several years.