Make sure the antenna is tight. It likes to fall off. Mine fell off on my way home from the dealer.
I added a metal license plate frame on mine because the plates I was issued were cracking around the mounting bolts.
A good GPS or waterproof phone case + power.
If you're good at math and aren't OCD you'll probably be fine with the speedometer being up to 10% off. It bugged me enough that I added a SpeedoDRD module so my shown MPH is true enough that I can depend on it. Most people probably don't care though, that at 70 indicated you're really only doing 67 or less (and wondering why you're getting glared at).
I like my V&H twin slash pipes. Probably a little louder than I wanted but they also look and sound great overall.
I also put on an EJK/Bully style tuner and did the RacnRay Throttle mod. While the throttle mod is a questionable upgrade for me, the tuner definitely helped cool the engine down under certain situations without any adverse affect on mpg.
I also put on a trunk rack as much for looks as anything else. I may strap something small on there but chances are if I'm that loaded for a trip I'm just going to hook my trailer up and toss everything in it. I usually have a solar battery pack on the trunk rack in case I need to charge a phone and don't want to turn the key to ACC to get power to the accessory plug.
Lots of folks recommend wrapping your pipes to keep the heat off your legs. I haven't done it yet so I can't give an opinion on whether or not it's worth it.
My next upgrade will probably be a bluetooth->stereo adapter so I can can listen to music from my phone without having to run an extra cable.
Things I wish I had, some of which are just too expensive: Saddlebag covers, fairing bra, heated grips, CB kit, passenger speakers, better cup holder, louder horn.
Have fun riding that machine! She'll get you anywhere you want to go that's paved!
I'll check the antenna this weekend and I have a nice plate frame to use when the plates arrive.
I use a Garmin Zumo 390LM so I can use the optional TPSM feature. I love it and plan to mount it this weekend as well. I've gotten so use to having tire pressure display as I ride, it's hard to ride without it now.
This is my 4th Kawasaki, I think all their speedos all off. Isn't that what the GPS is for?... LOL...
I'm going to play with the radio/iphone once I get the cables in (already ordered). What I would like is for music to push thru the speakers via iPod cable and the phone to ring in my helmet via a Sena system. Without the cables, I can't test that process but it should work. If it works, I think I'll run a phone adapter cable from the left box to the handlebar and put the phone next to the left grip. That's what I did on previous bikes:
Thank you for the other comments as well. Love the solar charger thought. As for the exhaust, I think the bike is loud enough as it is (I'm not one for noise), so I'll take my time on exhaust mods. I was looking at the throttle mod and will do that, but only if I do new grips. That one is also on the "not yet" list....
I want saddlebag covers I think. Being a "round" guy, the boots are going to touch the top of the bags, I know it's going to happen. I'll see what brands are out there and then move. I really think pads would be best, anyone know of pads (used TechSpec on my Concours).