I'm guessing this is a gaming rig? I personally will not buy ram with spreaders - they perform no useful function and they tend to interfere with aftermarket air coolers. Also, 8gb will be more than enough for gaming.
You should probably add one more 120mm fan (use as intake) - get a high volume, low rpm type for least noise. There are lots to choose from, and the major brands are all good.
You can add lights if thats what floats your boat - led strips, cold cathode, etc are all available.
Thanks a lot could you tell me a specific fan. One that you will recommend .