I have Razer Tiamat 7.1 Headset ,do i need to buy a sound card does make any diffirence in gaming

i want to buy 7970 graphic card do i have to change the processor 2600K for the new incoming games like GTA 

is PC Resident Evil 6 version  the same as the Xbox and the PS3

what i know about 6990 that they are loud compared to 590

I hope Pci-express 2.0 Graphics cards Price will go down after new Pci-exprees 3.0 cards will come out

what appears from the gameplay dog taging is more relastic than bf2

what about steam mover ,it moves the game from drive to another but keeps the original file in place so what is the use of that

will two 1tb WD black Series give a good perfomance specailly os booting

i have SSD 60 GB i have tried to install windows 7 and it boots fast but also i a have many games

Steam for example will not give the choice to choose the drive to install in so My SSD will be full in no time

i need to know the best hdd for raid 0 WD will be better

and if we can add SSD with them and if it makes any difference