I would rather have good tires on the stock wheels and suspension than anything else. Sure it looks the same but that will make the most appreciable increase in performance. Besides, fancy looking wheels just attract more attention from theives. If you do want to get rims, it's better to cheap out a little bit on the wheels themselves (as long as the ones you pick aren't trash) and get nicer tires than to put some crap tires on fancy wheels.

Adjustable suspension setups are quite overkill for driving on the street. I still don't understand why they're so popular. I guess people are really attatched to the concept of "pick-yer-own drop" or maybe they've been fed a line of BS.

Finally, good shocks with stock springs will make more of an improvement in the behavior of the car than lowering springs on stock shocks.

So....

Step 1: Get good tires. Obviously if rims are in the plan, they would be attatched to the tires.
Step 2: Get a set of lowering springs and upgraded shocks.