The Antec 900 case (usually $139)seems to get recommended quite often on this message board. This week, it is on sale at newegg.com for $79, but the newegg email newsletter has a promocode that will take an extra $20 off making it $59. If you do not get the newsletter you can sign up HERE.
Another item that I see recommended here quite often is the PC Power and Cooling Silencer, which is normally $199, is also on sale at newegg for $119.
Lastly, another commonly recommended item in this forum, the Gigabyte GA-P35-DS3L motherboard, is on sale at zipzoomfly.com for $79.
sorry, no leads on CPUs, graphics cards or RAM today