You really need to try both the DT and GT.
If you're concerned about the weight and ease of use, the XC is not for you, and between the DT and GT,
the DT is a LOT faster to respond to steering inputs, even if it's heavier then the GT.
However, the GT will be faster up to 65mph you mentioned, and generally accelerate better from 30-50 etc
in stock trim.. but that's very easy to fix on the DT (which is tuned more for 55-75mph acceleration).
XC500 seems heavy when you look at it, IS heavy when you read the specs.. and it sure feels heavy around
town. Even the 250cc Xciting takes a lot more effort around town then the DT/GT.