Fixing up my 26 foot Olympic and wanting to get some advice on a GPS/Sounder unit. I will be fishing salmon, halibut, Ling cod and hopefully albacore when I get my confidence up. Most all of my fishing will be in the Straights and West Coast. I have seen other threads on some sounders picking up kings and halibut and others not. What are some recommendations for a combo unit? I also need some advice on transducers? I like the Garmin 740s but that is expanding the top end of my budget by a ways. The Lowrance HDS 7 also looked promising.