So my dad and I are going to build a gaming computer soon. We're looking at parts and I'm wondering if this is a good build(we're not done yet)

Case: Raidmax ATX-802BP ($30)
http://www.newegg.com/Product/Produc...82E16811156074

Power Supply: OCZ StealthXstream II OCZ700SXS2 700W ($40)
http://www.ocztechnology.com/ocz-ste...er-supply.html

http://www.newegg.com/Product/Produc...82E16817341040
http://www.ocztechnology.com/res/manuals/SXS2_info.pdf

Processor: AMD Phenom II X4 960T ($110)
http://www.newegg.com/Product/Produc...82E16819103995

Motherboard: ECS IC780M-A2 (V1.0A) AM3 AMD 770 ATX AMD
Motherboard ($30)

http://www.newegg.com/Product/Produc...82E16813135250

Memory: Patriot Gamer 2 Series (2 x 4GB) 8GB ($35)

http://www.newegg.com/Product/Produc...82E16820220558

Video Card – Radeon HD 6750 (with fan) for $100
http://www.newegg.com/Product/Produc...82E16814161379

Trying to convince my dad for us to upgrade to a Radeon HD 6850 for $50 more, would it be worth it?