I use this PC as a general, everyday computer, and also to play some game. unfortunately, it has an AGP x8 slot for its graphics, so the best graphics card you can buy is an ATI HD4670.
but the computer itself is really good. its fast, very reliable, and easily upgradable. it can take a maximum of 8GB of RAM, and all of the XEON processors, but if you are looking to have a top spec pc, i'd recommend getting something else.
if you are on a tight budget, this pc is really good. as it is being thrown out by a lot of companies, they are going dirt cheap, some for around 100 pounds. it has 4 usb 2.0 sockets, space to upgrade the disc drive to a re-writeable one, and is great for multitasking, as it uses intel's hyper-threaded technology.
so if you are on a very tight budget, and are just looking for a pc for your everyday needs, then this PC is perfect for you.