I just received a MacBook, and have done a quick startup test. Surprisingly, my iMac and my MacBook both started in the same time. Both have 2GB or RAM, but obviously the MacBook is DDR3 whereas the iMac is DDR2. Both have no programs set to run on startup, so why isn't my iMac faster? Also, after startup I would usually open iTunes, Safari, and EyeTV at the same time. The MacBook opened these alot quicker than the iMac, especially iTunes which took a good 10-20 seconds more on the iMac. Both iTunes libraries are the same. I also loaded up a GarageBand project on both Macs. The project has alot of tracks in it. Scrolling down the tracks whilst it is playing lags a bit on the iMac, however it is smooth on the MacBook. Both running iLife '09. I guess my iMac is not performing as it did a year ago when I bought it. What can I do to speed it up again?