I was looking into upgrading the 500 GB HDD in my mid-2010 13” MacBook Pro to a 1TB SSD ($306 at OWC). The HDD currently has about 65 gigs free, and also 8 gigs of RAM. I happened to notice that they also sell preowned Macs and decided to look. I could get a mid-2010 27” iMac, with a 2.8 GHz i5 quad core, with a 1TB HDD and 8 gigs of RAM for $699. seems like pretty good value for money to me. The most intensive usage is photo editing in Lightroom and Photoshop. I notice significant slowing when importing large numbers of photos at a time, exporting files, and also a general sluggishness when using these apps. All files are stored on an external RAID, connected by Firewire. Obviously the large screen would be nice. What I’m wondering mainly is which would be ultimately more up to the task of what I am doing: MBP with upgraded SSD, but slower Core2Duo processor, or iMac with slower HDD but with faster i5? Secondly, anyone have any experience, thoughts, and/or feedback about these pre-owned Macs? Any and all comments welcome. Thanks.