I'm fascinated by the insides of computers although I will admit I've not opened this one yet, it's still running under warranty, mind you I wouldn't have to pay if I wanted anything done my son-in-law is an IT Technician.
I've upgraded previous machines with bigger RAM chips, this machine has 2GB and at present does a very good job at keeping up with me. I have thought about putting in a dedicated graphics card but really the onboard chip works well I'm not into streaming video or TV or for that matter into photo or video editing, if I was then I would seriously consider it.
So at the moment I don't really see the need to mess about with the innards of my machine I'm happy with it, as the advert says, "It does exactly what it says on the tin"