Koni's are the best struts available for the Contour right now. They are not 5 way adjustable; they are fully adjustable. The springs are your choice, depending on what you want your car to look like. You can get Eibachs from
www.shox.com for $182. Send them a quote request for Eibachs and in comments mention that you are from contour.org.
Sway bars- Aussie has a 24mm rear sway bar which is a significant imrovement over the stock bar. I think he is making a new batch soon for $125 total. There is also a 21 and 22mm bar as well.
Front Strut tower braces may or may not improve handling due to the fact that the towers are so close to the firewall that they don't need extra support.