I'd suggest 7.5 and you probably won't want to go wider than 225's if your planning on lowering the car alot. Personally coil-overs are the way, this allows for more versatility it you change skirts, tires or other features that may affect your clearance. Plus if you just want to drive to the cottage and the roads are a little rougher you can raise it up. The ride will be a little rougher but jsut make sure you get some struts that provide adequate dampening