Hi Derek,
I am no pro on the subject, but it seems to me you should focus on two areas; the V-6 racing outboards (where their newest technology is first deployed) and the cool things that Mercury is doing in the I/O arena. I love the "Sky-hook" technology associated with the I/Os, saw it at a boat show a few years ago... where the system is GPS enabled (designed to fly-by-wire) and a precision system that will virtually hold your boat in any position and direction without any mooring lines/anchor... in spite of wind and currents. In other words, pull up to a spot, and press the sky-hook button and the computer will hold you in the exact spot... pull up to your slip and step off and the boat stays put until you get the mooring lines tied... pull up to your favorite fishing spot or to chat with someone in another boat... and you boat just locks itself in place... sure the engines/shifting/steering are busy, but you are hands off. I am not 100% positive if Merc brought that innovation to market first, but at that time, no one else was marketing it. They also have duo-props, but that is old Volvo technology. I think also you should look at the performance I/Os... very impressive.
Hope this helps.