This is a line of "consumer" computers from IBM. They tend to be unusually expensive, and have a reputation of being constructed in a flimsy manner. They are also generally proprietary; if you want to upgrade an Aptiva, you are pretty much out of luck. It surprises me that a company like IBM, that used to manufacture equipment built like a tank, has stooped to building such utter garbage.

This is why I recommend anyone who is seriously into computers to build your own computer. You can get much better parts this way and have a decent upgrade path.