Since cost are equal would you go for a new 27" iMac (lower base model) with the 1TB Fusion drive or 256GB SSD. Old iMac was 256GB SSD + 1TB HDD - pre Fusion model. Based on my Time Machine backup my SSD had 65.3GB which can be pared down to 47.75GB And my HDD had 165GB which 65GB can be offloaded to an external and the 100GB iPhoto library can be pared down to 63GB, removing all video and putting that on an external. But I would want to move my main photo library to the SSD. That would leave me with 111GB of internal storage. Get the Fusion and let it manage essential apps and parts of the photo library but hopefully get good speed on what I do need on it. (Also probably going to switch to Aperture as well). Or Get the SSD and hope that the 256 fills my onboard storage needs. I can offload the data I need to, but would like to keep the entire photo library on the SSD if possible. Though I understand that Aperture can have various parts of the library in different places. (internal/external). But I would still want iPhoto to be able to cross open the library for things like Calendars, etc. I haven't really used Aperture so I don't know how much of the consumer level iPhoto functionality, calendar ordering, Photostream, faces, etc. is built in. Thanks.