Eddie said:
The 45 is stiffer than the 400, and the 2003 onward models have much better handling and ride. Quite firm but superbly damped, as well as lighter 'quicker' steering. I would say 90% of the ZS' handling without the stiff ride!
I did a mini review of my 45 here:-
http://www.members.aol.com/roverron32/Newcar/index.htm#top