I will order the 21,5" on Friday, but am not quite sure what options I should go for. I will definitely go for Fusion. The question is wether I should spend my last few quids on the i7 or go for extra ram, as they are non-upgradeable. I do photo editing in Photoshop cs5, working with pictures sized 10-30mb. I will also do some light video-editing in iMovie, primarily working with 1440x1080 mp4 files. Apart from that the iMac will be used for browsing the web, mail, word, excel and powerpoint. I will never use photoshop and iMovie at the same time, so the ram doesn't need to handle booth programs simultaneously. I know many people argue that I should get 16gb ram to 'future proof' my iMac. But I only plan on using the iMac for 2-3 years, so I prefer the upgrade that makes the best performance boost now. From my estimate, the programs I use will very rarely exceed 8gb ram. Would you agree? And will I benefit from upgrading to i7? As far as I understand, I will not benefit from 16gb of ram if I only tend to use 4-6 gb at the most, but the i7 will give some (might only be minor though) boost compared to the i5.