Great. I'm still using the same software I was when I bought my iMac (albeit Ableton 9, instead of Ableton 8) and am editing video footage with Final Cut Pro X, which came out.. what.. two years after my iMac was the fastest you could buy?
Thusly, I'm really not sure what anyone thinks my GPU is being asked to do today, which is radically different to what it was asked to do when I purchased it, around five years ago. I don't play any games; although if I did, it'd more likely be point and clicks, rather than first person shooters.
I reckon I'll buy the 1Tb Evo 850, for sure and will pay them to fit it for me. I see no reason why I can't continue using Ableton, Final Cut Pro X and Adobe Creative Suite for several more years on this machine, with a new hard drive?