Davvid ,
looks like you've been covered with answers.
I enjoy the cassette. I make my own mixes and once in a while cruise the old music stores to pick up pre-recorded tapes for cheap.
I also use my Garmin, connected via a Y cable to the audio system aux input. It has a SD card slot that I use for my music library. I get music and turn directions that way. You can easily add a Bluetooth transmitter if you don't want the gps unit. I even added a passive mixer so I could add an XM receiver as well. That and the GPS live on the bars just fine.
In addition to maintenance mentioned, every thing you do to bike from now on should be considered a baseline for your future maintenance. So basically, the more you do after purchase, the better off you will be... Even in terms of getting to know the bike.
As mentioned, the bike feels heavy when you first start to ride it. Ponderous is the word that comes to mind. I lowered the front forks about an inch and that changed the handling dynamics for the better! Procedure is on this site. I've been across country with scoot and found it to be a very pleasant experience. Seat is very good. I bought the widest/tall Clearview windshield with vent and stayed dry in Oklahoma storms. (Except the knees). I could ride all day and not be tired. Says something for the comfort of having a heavy bike. And I'm not young anymore!
Good luck, stick around here. Good people and lots of help available!
David