Hey, I'm currently still getting components for my custom build and have been doing so for the past year or so. I'm current deciding on what storage option to go with, I already have a 2TB 7200RPM HDD and im wondering whether to get another 2TB 7200RPM and RAID0 them or alternatively get an 120GB SSD. I plan to use the computer for gaming and therefore require FRAPS to perform properly and cause minimal fps drops.
The price/capacity ratio is indeed better for hard drives, but this doesn't make it convincing. People have been shedding their raid arrays for the faster SSD's. If you can't afford or justify purchasing an SSD, then go with the hard drives.