Update:

All four of the new 1Tb SSD drives are now installed in my studio pc, so far it has been running really well, like a brand new pc, no more spontaneous shut-downs, or refusals to boot up at random times, it boots up much faster and isn't running sluggishly like it was before, it was definitely worth doing the upgrade.

Okay so the next upgrade I will be doing to my studio pc will be installing three more 8Gb DDR3 1600Mhz Ram sticks on the motherboard to max it out to 32Gb, there are three spare Ram slots on the mother board and currently one 8Gb DDR3 1600Mhz Ram stick installed, I may upgrade the graphics card at a later stage, since I also use my studio pc for gaming as well.