I built a new computer a few months ago, still gotta do some cable management, not as impressive as your system but I will probably upgrade the processor soon and the video card.
I am running a
Intel 2120 i3 3.3 ghz 3 mb cache
8 gigs ram g.skill DDR 3
Radeon 6870 1 gig ram xfx video card
Biostar tz77b motherboard
90 gig corsair solid state drive
1 terabyte seagate harddrive both running on Sata 3
Antec 620 watt neo Eco psu
Antec 300 illusion case
Spent around 620 for everything
Spent 600 dollars on the setup, I mainly use it to play games and what not but hopefully upgrade to a i5 soon.
Solid state drive on windows 7 I am getting about 4 second boot up time, virus scans and running games, multiple applications is insanely fast.
Also using a Razer black widow mechanical keyboard blue switch and a Razer death adder mouse with adjustable dpi
This is the computer I built