ok so at the moment i use a powermac g4. (dualie 500mhz 512 ram) tiger I was new to macs around 3 years ago and decided to buy an older one. it is fine for what tasks i do,(browsing,major ebay seller, but i have noticed that it is slowing down day by day and i think it maybe a good idea to get a refurbished iMac. everyday i see the box "your startup disk is full" and im just to lazy to buy another harddrive. i have an apple aluminum cinema display so the 20" size is good for the imac I have heard that the 20" refurb from apple for 999.00 is slow and not great, is that true? is the performance from the imac comparable to the mac mini i think that the 999.00 is a pretty good deal, and i think that it may be good for my tasks. main question. will i see a definite improvement in speed from the slow powermac to the new imac? and it the price worth it?