I have the following components in my computer:
https://docs.google.com/spreadsheet/ccc?key=0ArazBkOGrxEbdDhjc1lJWklJMEV5RlVrdzVYcHdMYWc
The system currently works okay with Ubuntu 11.10 and unity. It just seems a little clunky. Which hardware upgrade would give me greatest performance boost in Ubuntu 11.10?