Dell XPS Full Gaming Machine setup. ?

This is my beloved Dell Xps 420 has served me very well over the last year and is an amazing machine! But due to needing to raise funds for a project shes the first to go! Specs are: Quad Core Q6600 6 GB Ram (Upgradable) 1TB HDD(Raid) 1GB Geforce GDDR5 GTX550 TI Gfx card (HDMI Port) (Month old card) Front panel Sideshow LCD Windows 7 Premium 64 Bit (Legit) I have the box and all paperwork for the machine too! This plays all the latest games as u can see from the picture I have been playing MW3 in top settings. Comes with Mouse, keyboard, 23inc AOC monitor (Month old) in near perfect condition and 2.1 speakers with sub. As I said this is to raise money so cant accept any offers but at this price for all this its a bargain!