Here are the current system builds as of 3/22/2012. This is the most economical system.
It is a basic system that will perform most task, play DVDs, some video games. This system is the most cost effective system with enough performance to keep most people satisfied.  This is not the cheapest system that can be made but, an economical system to get the job done. There are 3 systems you can choose from but, you may ask, "Which one is right for me?"  Well,  I like to use the car example, "They will all get you from point A to B but, how fast do you want to go?"  Do you want the Volkswagen Bug, Nissan Altima2.4, Nissan Altima3.5 or a Ferrari. Finally a cheap quite system for HTPC. Need to build a complete system with keyboard, mouse and monitor, then check out my system extras page.

  Least Expensive Gaming machine Rocket Ship  

Least Expensive System
Amount Item Part Number Description Total
1 Case Three Hundred 430 Antec Three Hundred 430 Case $95
1 CPU BX80623I32120 Intel I3 2120, 3.3Mhz Dual Core Processor $128
1 Motherboard GA-P67X-UD3-B3 Gigabyte GA-P67X-UD3-B3 Motherboard $115
1 Memory F3-10666CL9D-4GBRL G.Skill 4gb ddr3 $28
1 Hard Drive HD103SJ Samsung 1TB Sata $120
1 Video Card   Included with Motherboard $0
1 DVD Burner DRW-24B1ST/BLK/B/AS Asus DVD Burner SATA Black $20
1 Case Fans R4-L2S-122B-GP 2 Cooler Master 120mm blue fans $12
      Total $518