Time to upgrade from my reliable 2008 iMac. So I am considering getting a i5 retina 8GB, Fusion, 290mx or a non retina i7 with same ram and fusion drive, GTX 680mx. I plan to use this for basic daily use and entry level photography. I have been to the Apple store multiple times to compare screens but honestly do not know if retina is worth it. I appreciate your opinions and experience, thanks!