Welcome aboard Mike. I can't help ya much with the sound system, I don't use mine much and haven't delved into it much except for the occasional listen to the radio or some of my own music on a flash drive. As for navigation, I'm a paper map kind of guy.
I can offer some info on the Ultimate seat though. As I told you in my PM from the other site, I think the OEM seat on the "6" is the best OEM seat I have had on a motorcycle. My main complaint was that I needed to straighten my knees a bit and being short, highway pegs don't do a lot for me. That's why I bought an Ultimate "King Rider". It sits me a little higher because the foam doesn't compress as much. Then I got some KuryAkyn mini boards with 3/4" comfort drop mounts. The combination of the seat & lower boards gave me what I needed for knee comfort.
Good luck & enjoy that new ride when our Hoosier Winter releases its grip.
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