Good choice. In the end, you have to go for the best you can afford, and if you're gonna do photo editing, esp if it is RAW files from any modern SLR, then 16Gb is definitely more useful than a few more MHz. Personally I still use my 2008 iMac maxed to 6 Gb RAM for my photo editing in Aperture and Photoshop, and it's straining at times purely due to RAM, esp if I need to edit an Aperture file in Photoshop at the same time. If I could afford it, any recent vintage iMac with 16Gb and Nvidia graphics would be my choice. Not a fan of Intel integrated graphics, though it is fine for most non-intensive use.