Install it yourself if your able, it's not that hard and plenty of folks around here willing to help anyone out. I would also recommend the humminbird as well for the lakemaster map card. My only suggestion would be on the Helix 7 SI go ahead and pony up for the HD transducer. I had the Helix 7 SI and was not pleased with the clarity of the side imaging. The DI and Sonar worked great, there are some that will argue the HD won't make any difference with the 7 cause of the limited processor power. I researched it quite a bit and you will get a slightly clearer picture due to the thinner beam on SI. If this will be your only unit and the one you will use it for a long while I would also try to get the Helix 9 SI if it was at all possible, check with Brian at BBG Marine think I overheard someone the other day say he had a sale going on the Helix 9 SI Gen1