Stock copper champion plugs work best in the neon. Don't waste your money on split fire or platinum plugs. Magnecor and MSD wires are both nice replacements for the spark plug wires. But keep in mindm that plugs and wires don't give you added HP. Don't waste money on an ignition system unless you are ready to start plumping down some money and tuning the car.
As an alternative to the Iceman intake (best for the 95-99 neons) you can build your own 3.0L intake. If you have a manual transmission, then you have a 49mm throttle body(TB) on there. The automatic TB is 52mm wide. This allows your engine to breathe a little bit more.