Help me improve my build before I buy ($800, 3 monitor system)

My main requirement is just that it be as fast as possible for my basic browsing activities, since that's how I spend most of my time. I do play video games sometimes, but nothing hardcore, and I don't care if the system can't play them on High. I've got a parts list down below. As you can see, it is over budget, so I'm hoping you guys can suggest cheaper parts without sacrificing too much power.

Approximate Purchase Date: This weekend
Budget Range: $800 (just for the PC, no peripherals & no OS)
System Usage: Browsing (90% of the time), Dota 2, Counter-Strike: Source (don't care about newer games like Crysis 3 or Battlefied 3)
Buying a monitor: No, I already have three monitors, so the graphics card has to handle that
Do you need to buy OS: No
Do you need a mouse/keyboard: No
Preferred Website(s) for Parts: Don't care, but I will be ordering online
Location: United States
Parts Preferences: I'd like to keep the Fractal Design case, but I will swap out anything else on the list if there's a better value suggestion
Overclocking: No
SLI or Crossfire: No
Monitor Resolution: 1920x1080 (3 monitors, not doing Eyefinity/Surround)

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor ($149.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.71 @ Amazon)
Motherboard: ASRock H77 Pro4-M Micro ATX LGA1155 Motherboard ($89.99 @ Amazon)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($40.99 @ Newegg)
Storage: Samsung 830 Series 128GB 2.5" Solid State Disk ($119.00 @ B&H)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($67.99 @ NCIX US)
Video Card: XFX Radeon HD 7850 2GB Video Card ($179.99 @ Newegg)
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case ($100.49 @ Amazon)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($53.99 @ NCIX US)
Optical Drive: Sony AD-7280S-0B DVD/CD Writer ($18.99 @ Newegg)
Total: $851.13