Well, I'm sorta answering your questions in all your threads, so go check out your post in the Engine Mods forum about the 2.4 swap.
As long as the brakes have plenty of life left, and have been serviced properly, you'll be alright. Personally, I upgraded to Hawk HPS pads and Raybestos rotors. The suspension on the other hand, for the base model, is just terrible for performance. Most of us have swapped to the FE5 struts and shocks with some good lowering springs. That's the struts and shocks from the Cobalt SS/TC. They perform much better than your stock FE1 struts & shocks. Also, if you want to lower it, the FE1 stuff will blow out real quick while the FE5 stuff will handle it just fine.
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You might not want to get a tune until you supercharge it if you know for sure you're going that route. Just sorta a waste of a couple hundred bucks. If you don't boost it, and you want a tune, then definitely get the LSJ throttle body as well.
Believe me, these cars have a habit of growing on their owners. Your feelings will only strengthen over time...