The raptor is/was very good for the os because the 10k rpm gave it fast random access times for small random reads and writes. A task that the OS does a lot.
Today, the larger denser 1tb drives work well. Particularly with sequential I/O. The higher density makes for faster data transfer rates. Get one, even if you don't need the space.
If you have the funds, consider a SSD. It will transform the OS part of the equation, and sequential traqnsfsr is 3x the fastest hard drives. Random access is 50x.
Expect to pay $2 per gb.
You might get a 60-80gb ssd, for the os and your current game, and use the raptor for overflow.