I'm interested in buying 27" iMac. I am a casual photographer (not too much editing, mostly in iPhoto but hope to learn aperture). I have a library of close to 30,000 pictures and growing. I'd like to spend between $2,000-2,300 so was thinking about the 2.9GHz with upgraded 3TB Fusion drive to add speed and storage. Any opinions? Will that size library even fit on the flash portion of the storage to make the fusion useful? I know the computer automatically picks what goes to flash storage. Does anyone know if it looks as iPhoto and the library as one big file or could just certain libraries be on the flash part that are more frequently used. Also, has anyone had problems with the fusion drive? seems like some reviews indicated it isn't proven technology yet and people are worried it could fail.