Apologies if it's bad form to post this in a new thread -- I buried it in the "new iMac" delivery thread originally and I think that was the wrong place for it. Happy to delete that post if that's proper protocol around here. This said, here's my (very long) question: Hi, all. New poster to this forum. As you can tell from my user name, we are about to a buy a new iMac. I am having a bit of trouble picking the best option and would love your advice. Here's what I'm thinking: We've gotten every inch we can out of our 2007 iMac -- it's got a 2.4GHz Core 2 Duo and 4 GB of RAM and beach balls pretty much whenever I want to even think about opening a photo or editing a video. It's been outmatched for a good while, but we were't in a position to replace it. Now we have reached the point where we have to do so and I am pretty sure I am going with a refurb. There are two appealing choices, both 27" (and both of which I'll likely upgrade aftermarket to 32GB RAM): 1. 3.4GHz (i5), 8 GB RAM, 1TB hard drive, and the 2GB graphics card. This is $1659. 2. 3.5GHz (i7), 8 GB RAM, 3TB Fusion drive, and the 4GB graphics card. This is $2289. I'd love the latter option, which is essentially top of the non-5K line (putting aside the memory upgrade, the only option missing is the 1TB flash drive in lieu of the Fusion drive, and I'm not sure that's really better considering the relative capacity). But I wouldn't mind saving $630 either. My kids generally limit their use to Office products and surfing the web. I edit a lot of photos, but only lightly using Aperture and have no interest in switching to Photoshop any time soon (but likely will use Pixelmator if necessary). My photo library, however, is around 10K photos and growing. I also edit video, both from smartphones and a GoPro. But no 4K -- at least not yet. Recognizing that even the lowest end 21.5" machine would be blazing compared to my current system, we finally reach my questions: 1. How much of a plus is the Fusion drive day-to-day, particularly if we really only turn our computer off when we are on vacation? And how reliable do we think it is considering flash memory often dies for no apparent reason at least when using memory cards? (I realize we are talking 3TB v. 1TB, but I don't mind expanding via an external drive if I have to.) 2. How much of a benefit is 3.5 GHz chip over the 3.4 GHz chip? I've seen the various benchmark scores, but they are meaningless to me. 3. How much of a benefit is the better graphics card, particularly as I don't really use our computer for games? (Is it important for photo or video editing, or only for rendering graphics? I can't seem to get a straight answer on this.) 4. Any overall advice as to which system I should buy? Arguments for buying new? If so, any particular configuration? Thanks in advance for any and all insight!