As a person that knows more about DELL systems than the average person, I can't say why tho lets' just say I get money from them) the 2100 is a great little workhorse Dell has done very well to keep that system a little runner. the only thing you may not care for is the video. Don't get me wrong the video in this system is very solid and is capable of working very nicely with poser. The intel video is not fully designed as a performance video. It is AGP and it does do 3d rendering pretty well. The thing is the the 4 mb dymanic memory is comming from your conventional memory That 256 Mb you plan on) So the deal is this, the system you are planing on is a runner and will do well with poser and many 3d games and apps. but it will not be the performance system TJ has.