I still have all but two of the previous nine systems I've built in use. Each year I put together a new machine but it is just to keep myself up to date on the latest and greatest hardware, part of my job security. The older units are kept running and on the network as they were built for a reason and that need hasn't gone away. I could build a unit to do it all, but that's a lot of hardware to put in one case and expect all the software to play nice together. At present I have a P3 unit that has a sound studio card and CD burner, a P4 unit that has video capture/edit and DVD burner with a 19 inch widescreen display, a simple Duo Core for web surfing/online purchase and banking and my newest is a Quad core with a 768MB video card, gaming keyboard and 22 inch widescreen for games. I also have a P4 that sits on the network with two 500GB drives, attached printer and scanner for each unit to share and store video, photos and music to. My daughter has a P4 for her surfing and the son has a Duo core that he uses for games. Nothing goes to waste and the bulding experience has given me great insite into manufacturer selection for drives, and cards and what software plays best with what hardware. The two units that were scrapped(E-waste) had bad motherboards, one with an IDE controller failure and the other with a CMOS/BIOS fault and serious underrated power supplies for subsequent builds.