Replace the Samsung drive with a WD Black and the GX power supply with a TX. If you need to cut costs, you can downgrade the motherboard. If the CPU comes with a cooler, you don't need that aftermarket cooler.
Make sure that ram is a dual channel kit, not a single module.
For the money, I'd get a fast quad core instead of a 6 core.
A single 6970 is plenty good enough to drive 3 monitors.