Welcome mopar71. The 3 main things I added for long range comfort was seat, looks like you are already working on that. I went with Corbin but there are lots of good aftermarket options. Among others Spencer can lower your stock seat and add better cell type support for a very reasonable price at
www.greatdaytoride.com. Second is I brought the handles bars up and closer. I eventually went with Horizon ST bars from
www.heilbars.com but there are lots of other lower cost riser and pull back options. Just search for risers in the forum. And third I added the canyon cages from
www.mcenterprisesusa.com. You might wonder how these help with long range comfort. Well the reason is they make it easy to add highway pegs. I find having the ability to change you leg position from time to time makes a huge difference on a 900 mile day.
BTW: welcome to the forum and tell us about your mopar ride