Is this a good budget gaming build for £350/$500

Approximate Purchase Date: This week
Budget Range: £350/£500
System Usage from Most to Least Important: Gaming, Surfing the Web, Watching Movies etc
Parts Not Required: Keyboard, Mouse, Speakers, OS, HDD
Preferred Website(s) for Parts: Amazon UK
Country: UK
Parts Preferences: N/A
Overclocking:No
SLI or Crossfire:No
Monitor Resolution: 1280x800
Additional Comments: Look cool, reasonably quiet and be awesome

Parts:
Antec One Midi Tower Case - Mini-ITX, Micro-ATX, ATX, 2 x USB 3.0
Corsair CMPSU-430CX Builder Series 430W Power Supply
Sapphire 11179-09-20G HD 6870 1GB GDDR5 Graphics Card
Asus P8H61-M LE/USB3 Motherboard
Intel i3-2120 Sandybridge 3.30GHz, 3MB Cache, Socket 1155
Kingston 4GB 1333MHz DDR3 Non-ECC CL9 DIMM Memory