Will be getting my ps3 soon and thought it'd be better to upgrade the hdd before i make saves and having to re download everything, so i heard it voids the warranty but if something goes wrong with it cant i just put the 40gb hard drive back in? would they know? also ive downloaded a few blue ray movies of the net, is it possible to transfer them to the ps3? if so how? and any one got any recommendations for a hdd? looking for over 120gb i saw this onehttp://www.ebuyer.com/product/122072
but would get it from ebay for £50, thats only 5400rpm if i got the 7200rpm http://www.ebuyer.com/product/122072,
would it make much differnce??