In order, I would rate the models with the best handling (ie most agile) first as:
4/4, Plus 4, Roadster, Aero, Plus 8, Flat Rad and, somewhere off the scale, the 3 wheeler ...
But, of course, there are different flavours within each model - and they will drive differently. The earlier, narrower Plus 8 on skinnier tyres for example is more agile than the later wider version. So just keep trying them out and find one that brings a smile to your face.