I'm considering an 07 1200R also. Haven't had chance for a run on it yet, but my reasoning is simple. The 1150GSA is big old lump and takes some handling at low speed and parking. BUT I can't face loosing the wacky suspension arrangement, which isn't really wacky - it makes mincemeat of the Dales roads around here!
So far I've only managed a paper check on the specs and ergonomics, torquey engine compared to the 1150, lighter and lower seat.
Just have to get out on it and give it a ride!