Hi,
I've decided to go with SSD Upgrade for my PC.
As the boot up / shutdown and application load time is sluggish / slower.
My config
Motherboard - http://www.asus.com/Motherboards/P5KPLCM/
C2D E7300 , 2GB RAM, HD 4850, CM 600 watts , 1.5 TB + 640 GB.
Purpose - Web browsing , Movies ...