1. no real need to and i would not suggest doing so unless you are already familiar with overclocking, or if you want to take the time to research it 2. neither. also, the only OS that "supports" SSD is windows 7 and i highly recommend windows 7. and the rating does not mean much, HHDs are locked around 6.1 or so and you need SSDs to go higher. We do not know how SSDs will last. You will need at least a 64GB one though with windows 7 on it, unless you only want the OS on it then you can get a 32GB one. if you are willing to pay the price then go for it but you really do not need one. Do you need storage space at all?