Post the website that you're buying this from.
Drop the processor to an E6600. This will overclock this as far as the E6700.
Drop the memory to 2 x 1GB. Nothing uses more than that at this moment, and you can always add another 2 x 1GB if the need arises. Note: YOU WILL NOT be able to do anything quicker simply by having a large amount of RAM. The RAM has to be used, and if 1.5GB are being used, then you will see ZERO difference between 4GB and 2GB memory.
Drop the PSU to something more reasonable. Its way overkill. I'm getting tired of repeating myself, so I'll just link this.
Good Lord, drop the motherboard. See if you can get a hold of the ASUS P5B Deluxe. It'll do everything that the P5N32 can do.
Change the Hard Drives to smaller versions, and then combine them to add up to your 750GB. It'll save you a lot of money too.
IIRC, the Blue Orb II is made by Thermaltake. You'll want either the Zalman 9500 or 9700.