I love my 2013 FX, I ride it every day. There is always a 110v outlet everywhere in America. Look around at work, see if there's someplace to plug in. I've even ridden inside and plugged in at some clients.
I get 30 miles highway at "as fast as possible in light LA traffic" That includes dropping it to 70mph when it starts to get hot, and trying to draft vehicles when I can. I get about 70 miles of mostly surface streets at 30-50 mph. I haven't done any engine or controller mods, and am fine with the available settings. I've also ridden S's and SR's and would take the lesser range of the FX over those bikes any day. As you discovered, it's the most fun you can have on two wheels!
Most important mod for daily riding- S wheels and Pirelli tires. Dirt tires have no place on pavement. I also have a Givi topcase on mine and the Zero handlebar mount for my phone. I have USAA insurance, which I love, but it's only for military & their families. If they ask cc's, say it's equivalent to a 250cc.