said by floydb1982:I go for the cheaper Hard Disk Drives because you can get a single 2TB, 3TB, and even a 4TB Hard Disk Drive. I go for the storage over speed.
It is not either/or. If you want a huge upgrade, put a boot SSD in the computer (minimum 250GB) and use the mechanical HDD as a data drive.
That said your current upgrade looks fine--if anything, you could throw an SSD in it and upgrade to a new GPU (like Mike said, the Radeon 7000s are on sale right now as the newest generation just dropped).
But if you aren't having any slowdowns, and you're happy with it, keep things as they are.