If you're going to lower the height it would be worth getting a set of progressive rate springs. Cutting stock springs will work, but the ride compromise can be pretty bad. Eibach springs would give you the drop you're looking for (??? if available for the Crossfire). Not only are they progressive rate but much better made than most stock. There's a lot more meat to them. Reducing the spring height will wear the stock dampers as they'll be more compressed due to the reduced suspension travel.