Advice on my new build please {HELP}

The 6300, like mentioned above, is a better CPU. Your graphics card wasn't reporting a price, so I hope you aren't considering a $600 budget, but an $800 budget. Changed it around for you.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($107.99 @ NCIX US)
Motherboard: Asus M5A97 LE R2.0 ATX AM3+ Motherboard ($72.98 @ OutletPC)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.99 @ NCIX US)
Video Card: Sapphire Radeon R9 270X 2GB Video Card ($215.99 @ SuperBiiz)
Case: Antec Nine Hundred ATX Mid Tower Case ($69.99 @ Newegg)
Power Supply: SeaSonic 520W 80+ Bronze Certified Semi-Modular ATX Power Supply ($68.99 @ SuperBiiz)
Optical Drive: Asus DRW-24F1ST DVD/CD Writer ($19.98 @ OutletPC)
Monitor: Asus VX238H 23.0" Monitor ($129.99 @ Newegg)
Total: $813.89
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-31 11:41 EDT-0400)
 
I would go for this.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($107.99 @ NCIX US)
Motherboard: Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard ($57.96 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.99 @ NCIX US)
Video Card: Sapphire Radeon R9 270X 2GB Video Card ($215.99 @ SuperBiiz)
Case: Rosewill Line-M MicroATX Mini Tower Case ($49.99 @ Amazon)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.99 @ Newegg)
Optical Drive: Asus DRW-24F1ST DVD/CD Writer ($19.98 @ OutletPC)
Monitor: Asus VS229H-P 21.5" Monitor ($141.98 @ Best Buy)
Total: $781.86
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-31 11:57 EDT-0400)
 


If you can help it, you don't want to put the Vishera chips on the 760/780 motherboards. They're barely ok for the 4300, but don't have the ideal power delivery. At this budget, I would definitely not recommend one of those boards, unless mATX is a must.