How Can I Improve my ~$800 Build?

Dump the rosewill challenger for a good case
and change to an appropriately size 550 watt psu
add a dvd drive
and a quality motherboard

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($229.98 @ OutletPC)
Motherboard: Gigabyte GA-Z97X-Gaming 3 ATX LGA1150 Motherboard ($135.96 @ SuperBiiz)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($70.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.98 @ OutletPC)
Video Card: MSI GeForce GTX 760 2GB TWIN FROZR Video Card ($179.99 @ Newegg)
Case: Antec Three Hundred Two ATX Mid Tower Case ($54.99 @ NCIX US)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($54.99 @ NCIX US)
Optical Drive: Lite-On iHDS118-04 DVD/CD Drive ($17.99 @ Newegg)
Total: $799.87
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-21 20:56 EDT-0400
 

TomThePotato

Reputable
Jul 2, 2014
1,457
0
5,660
If you want to pay a little more, you can fit in a 970.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4440 3.1GHz Quad-Core Processor ($194.99 @ Newegg)
Motherboard: ASRock H97 PRO4 ATX LGA1150 Motherboard ($88.98 @ SuperBiiz)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($70.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.99 @ Amazon)
Video Card: EVGA GeForce GTX 970 4GB ACX 2.0 Video Card ($329.99 @ Amazon)
Case: NZXT Source 210 Window ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.98 @ OutletPC)
Total: $828.91
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-21 22:33 EDT-0400
 
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