JB,
That is what they come with from the factory and in my opinion (having had this set up on my own car), the rears are too hard and the fronts too soft .

LEDA do not make springs, they have them made to their spec by outside companies. Personally, I use Eibach (which is one of the companies that they also use). Most companies that do 2¼" springs, also do 2½".

If you go too hard on the rear, then you will not get any traction due to there being insufficient weight transfer. On track, 200lb is still a little too hard even (as an example, Martin's Escort runs 150s on the back!) and with my 170s, I have to have the damping on the lowest setting on the road and it is still fractionally too stiff (but I can live with it). Bearing in mind your car is 100kg lighter than mine, there is no need to go so stiff.