Well, about 7 Years ago I purchased a $70 Antec Computer case with large 250w Power Supply. This has been the case for my main computer since then.
As you can see it is very sturdy (the drawer that is open is the CD Holder), well worth the extra money back then over the $30 dollar ones, except if you want a lan party computer, this with everything installed is about 30 pounds. The case has been through 7 or 8 motherboards, a power supply replacement, 4 video cards, 2 vid capture cards, 3 sound cards(not including ones onboard the motherboards), 4 cd-r/dvd-r drives, about 6 different hard drives, a zip drive, and a floppy.
Its current configuration is: