SSD is really good for gamer because of its high read/write speed. It can largely reduce the waiting time in booting and game loading. If you look for the highest value option, Kingston SSD V 64GB is the one you won't regret.
If your motherboard supports RAID, then why not configure RAID 0, if you cant buy a SSD now?
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RAID 0 can double the original read/write speed. For example, if you have two SSD which has 180/50 Mb/s speed, you will get 360/100 after RAID 0 theoretically.