I need to buy a new ff for my boat im looking at a furuno 587 with 1kw transducer or a raymarine e7 also with a 1kw transducer.I have a humminbird 898 which i will use as a plotter with a navionics platinuim plus card but the bird is not that good as a ff offshore.Any suggestions would be appreciated.My main fishing is off Richardsbay and want to do some deep bottom fishing and gamefisshing.