I'd say rotors first, because they're not that expensive to replace. Turned rotors tend to eat pads when breaking in, so I'd recommend new ones.
http://cgi.ebay.com/ebaymotors/ws/eB...tem=7955943295
The dealer sounds helpful. Since you've already got lower profile tires, springs and struts would be the next step. While changing them it is a good idea to change the strut mounts as well. The strut bar won't help ALOT, but for the minimal expense, why not. I just have a cheap ($20 shipped) eBay strut bar, and I have no complaints. Most recommend Tokico struts, but I'm still stock so I can't tell you from experience. When I do have the cash to upgrade it's going to be Tokico for me though. Eibach, Vogtland, and Tein would be good spring choices for your car.