Upgrade Comparison: Old to New

Hey guys, could you give me an opinion on how much of an increase in performance I would see after upgrading to my new computer? I am reusing many parts, although I am replacing significant components. All the parts I am getting are already ordered, and I am very excited  

Current Specs:
CPU: Intel Core 2 Duo E6550
Motherboard: Intel D975XBX2
RAM: Patriot DDR2 4GB @ 333Mhz
CPU Cooler: Intel Stock
Video Card: XFX Radeon HD 5770
Power Supply: Kingswin 600 Watt
Hard Drive: Western Digital 500GB HDD
Hard Drive 2: Western Digital 160GB HDD
Operating System: Windows 7 Ultimate 64 Bit
Other Parts: D-Link DWA-552 XtremeN Network Card

Upgraded Specs:
CPU: Intel i5-2500k
Motherboard: ASUS P8P67 LE
RAM: Corsair Vengeance 8gb DDR3 Desktop Memory Kit (1600Mhz, 1.5v)
CPU Cooler: Intel Stock
Video Card: XFX Radeon HD 5770
Power Supply: Kingswin 600 Watt
Hard Drive: Western Digital 500GB HDD
Hard Drive 2: Western Digital 160GB HDD
Operating System: Windows 7 Ultimate 64 Bit
Other Parts: D-Link DWA-552 XtremeN Network Card

Upgraded parts in BOLD