Hear you on the fuel injection. Takes a lot of the starting and riding issues out of the equation. I replaced an '08 1800 with an '85 Limited Edition for that very same reason, fuel injection - and other reasons as well. My 1500 is good, and since I ride it all year round, carbs are not really an issue; however, after some 178,000 Kms and 25 years the carbs do need a rebuild. I know, if it ain't broke don't fix it, but carbs work better when clean and well tuned.
So in keeping with the thread, 1800 (fuel injected) from 2006 on. Check into the maintenance on these. 3-4 hours to change the $25.00 air filter - ouch.
Flushing/changing the clutch fluid is more time consuming as well. Have to take off the lower front cowling, and other items to get at the clutch slave. The 1500 has the best clutch fluid change setup.
Taking the rear tire off is like taking the tire off a car, 12 inch 1/2 drive extension and 5 nuts - I used an impact wrench. Choice of laying the bike on its side - not a fan of this, or take off some rear plastic - better option in my opinion.
Changing the brake pads on an 1800 is extremely easy, do not have to remove calipers.
1800 systems are more complex - to be expected, definitely need a manual.
When I had my 1800, good looking in black, didn't turn too many heads. When I sold it and started riding my '85 Limited Edition, people would stop and comment on it, reminisce as well. Just did a paint job on my '95 1500 - Pearl Glacier White - lots of comments and looks. Not a big issue, but the older bikes seem to have a bit more character, like the older cars.
Cheers