So I just got these wheels

http://cgi.ebay.com/ws/eBayISAPI.dll...vip=true&rt=nc

I am looking for tires and have narrowed it down to Direzza Dunlops or Vredestein Sessantas.

I am thinking about doing a drop probably 1.2 inches so stretching the tires will probably be necessary?

What does my cars shocks ride on stock? (c280 97)

Will I need to replace my shocks or can I drop springs in? and are coilovers worth it or should I just go with springs?

The plan:
225/35/20
255/30/20

Does this set up sound good? any other suggestions?