Correct me if I’m wrong, but aren’t you on a Phenom II X4 955/4GB RAM/1GB HD5750 box?
You should get a second opinion on this, but my guess is your CPU is still good for a while yet. You might benefit from another 4GB, a fast GPU(some of the Skyrim visual mods out there are designed with a fast 2GB GPU in mind) and an SSD for the OS, but that doesn’t necessitate the cost of a new build. And as Irenicus’s posts hints, the CPUs will have improved again by the time an X4 955 isn’t enough.
Potential caveats:
-The HD5750 doesn’t run as hot or burn as much power as high end GPUs. I can’t remember if your case and power supply were speced with a future “big GPU” in mind.
-Migrating an existing install to an SSD isn’t easy, and you might be better off just reinstalling Windows.
BTW, how much GPU you need is driven in part by your monitor resolution… I suspect inexpensive grey market Korean 2560X1440 monitor (most 2560X1440 displays sold in North American are pricy) have driven a few GPU upgrades in recent months.
