I really wanted a new desktop computer, but it looks now since I started my new teaching job it is more important to put away some cash and pay up some bills. It looks like I will probably be holding onto my 2+ year old iMac DV 400 for awhile longer. I just bought an iBook last December, but I still prefer the desktop for sitting at in the evenings. I would like to improve the speed somewhat and make the computer more responsive in OSX. It is not terrible right now, but it does lag scrolling and during some dock actions. Now I know that this machine does not hold the power of the newer Macs, but it is still a decent machine and I would like to get another good year to two out of it. Right now I have 128MB or RAM installed. It came that way when I bought it and ran OS9.1 like a bat out of hell. I am currently running 10.1.5 on the machine. What I want to know is will I notice any difference in system responsiveness if I fork over a couple hundred and up the RAM to 512MB and install 10.2. Is there anyone here that has a simular system and what was the outcome of doing those things. My iBook also has 10.1.5, but it has 256MB of RAM. All advice would be helpful. I use the iMac for MS Office, IE, Mail, Messenger programs, iTunes, iPhoto, etc. It works okay now, but I would like it to feel like it used to in 9.1 or at least a little more like it used to when it was new. Thanks.