Windows 7 - Feedback for my Web Development Server/Workstation Build

Use case:

- As a Web Development Server
- Run LAMP (Linux, Apache, MySQL, PHP)
- Others: FTP, Node.js (Server Side JS), Cloud9 IDE, Virtual PCs (Virtual Box)
- In the future: Python, Ruby on Rails

Considerations:

- Heat: Air con on during office hours only
- Power Efficiency: I like to be Environmentally Friendly & save on Electricty Bills at the same time
- Performance: Of course! In this case, Virtual Box will be most resource intensive I suppose

My Build:

- Intel Core i5 2400 (Or perpaps a i3 2100 will be more value for money? No Virtualization Tech for Directed IO VT-d (Will Virtual Box benefit much from it)?)
- Asus H57M-Pro
- 4GB Kingston DDR3 (2x2GB) (Is PC3 10600/1333 CL9 a Dual Channel DDR3 RAM? With the above motherboard, is this the correct RAM?)
- Western Digital Caviar Black 2TB SATA3 (My boss actually suggested a SSD tho, is it a good idea? I am thinking perhaps RAID 1 or 5 will give me performance close to SSD + more storage?)
- Cooler Master Elite 371 (Case)
- Cooler Master Hyper 212 Plus (CPU Cooler) - Is it true that Sandy Bridge Stock Cooler is bad? I am thinking tho since heat is an issue in office, maybe a non-stock cooler will be useful?
- Cooler Master Blade Master 120 (Case Fan)
- Cooler Master GX550 (PSU) (Maybe 450W will suffice also?)

Aside:

I am thinking I will have a similar build if I want 1 for my home too, except it will look like below

- Intel Core i5 2400
- Asus H57M-Pro
+ 8GB Kingston DDR3 1333MHz (2x4GB)
+ 2x Western Digital Caviar Green 2TB SATA3
- Cooler Master Elite 371 (Case)
- Cooler Master GX550 (PSU)
+ Samsung S24A350H (LED/LCD)
+ Creative T12 (Speakers)

Diff is marked by + and removed CPU Cooler, Case Fan

For home use, in addition to the use cases above, I will use

- Notepad++, NetBeans, Aptana Studio, maybe Visual Studio (Development IDEs)
- Photoshop/Illustrator or GIMP/Inkscape/Blender
- I will only access from LAN at most

Also I may get a GPU in future



What do you think about my build? Anything I should change etc?