I'd first suggest adding an SSD as your boot drive. Quick and relatively cheap upgrade. Just learn your way around a dual disc system (SSDs are not usually the primary for storage or applications).
Second, I'd look at the power supply. Might not have the right connectors or be a good unit. A great GPU on a crap PSU is a recipe for disaster.
Then I would up the GPU, and hopefully by then the market will be settled from the crapto craze