Yes. Have the 60 store OS and swap. And have the two 240's store games.
If you're an editor, then 60 for OS and swap, one 240 for scratch disk, one 240 for media.
If you use SATA, then you're probably wasting a little bit of performance having the two in RAID 0. SATA maxes out at 600 MB/s.
All the best!