SSD - just made the leap
One Raptor in my raid zero, recently failed and after much reading I went for the Intel 320 series 120GB, especially after reading some reliability stats.
I use XP and the boot up is considerably quicker, the blue squares that track across the screen during a boot used to complete 7 cycles, now it's 2.5, the PC is altogether better to use.
The intel software was very good at transferring the data from the old setup, and the SSD toolbox provides a schedule to trim the drive routinely.
My stuff is on a separate HDD's and backups (Ghost) of C go to 2 different disks. Board is ASUS P5WDH Deluxe so the sata 2 of the Intel appealed and I think they deliberately targeted upgraders without sata 3 boards.
I would recommend upgrade to SSD