I've done the 1100RT and 1200LT and 1200GS things, along with an HD Ultra stuck in the middle somewhere and now a new GT...
RT = Needed new screen, new seat and some sort of leg cramp relief for extended trips.
Results = but still got sore, legs still cramped ? gotta say though, bar position was OK bottom line, I did not miss it
LT = Needed leg cramp relief for extended trips and a back rest.
Results = good comfort for trips, a little heavy around town, and needed a tad more power, but we all know that. bottom line, I miss it
GS = Needed new screen, leg cramp relief for extended trips.
Results = Good comfort for trips, handled very well everywhere, plenty of power. I miss it more than the LT
H.D. Ultra = Needed nothing added other than backrest for great comfort. not too heavy around town, low center of gravity very forgiving.
Results = Great comfort for trips, plenty of power for my needs, I miss it
GT = Needed new screen, aeroguards, new seat, barbacks, something for leg cramp relief, but nothing available for this one. More power than I can use
Results = Guess I'm still on the fence on the GT. based on what I have just reviewed, I must say I would probably still be happy with either the LT
, or the HD Ultra
Just an honest observation based on my riding habits and needs..
If I was single, I would probably go back to a R1200GSA and be done with it