Budget Range: Up to $1,000
System Usage from Most to Least Important: Gaming, watching movies, listening to music, surfing the web, documents
Parts Not Required: keyboard, mouse, speakers, monitor (unless the build requires a higher res for the graphics)
I built a great system for Flight sim Gaming in Jan 2012. It uses an i5-2500k cpu, an MSI p67-g43(B3) Motherboard, HIS Radeon 6870 (w/eyefinity) GPU, 750w p/s, 8gb memory, a Rosewill Smart One mid tower, and 3 19" monitors. I bought the equipment from Newegg (great people to deal with) except for the monitors in Dec 2011. After rebates, and some miscellaneos items (to match my monitors with the GPU card, the entire cost was under $900. I run X-Plane heavily loaded, with Frames from 60 to over 100 fps - and this is without manual OverClocking.