I've been holding off the purchase for some time now, hoping for a better graphics card, but mostly for TB3, USB 3.1, full hardware 4K 10bit HEVC decoding. But, apart from the gpu, everything else depends on Intel now, and since they pretty much have monopoly CPUs they're not really in a hurry to get new technologies on board. I think Kaby Lake is what Skylake should have been, but anyways...I figured I can't wait forever and took the plunge. I'm saying all this because I know there are many potential buyers who are like me, always holding off until that next Apple keynote only to be dissapointed. Well, trust me, if you buy it now you wont be. I just got a late 2015 27" iMac, 32GB RAM, 512GB SSD, 4Ghz, 395 gpu. After spending countless hours on these forums I was pretty scared at what's in store, from heat issues to other common stuff people complain about here. Well, I can tell you, I was pleasantly surprised in every possible way. - the screen is beatiful - the machine is dead silent - I installed Windows 10 for my kids to play games, no problems there, works perfect, and still silent. - Sound is really good when you consider the thin design, coming from a laptop I can finally hear the bass lol - this one is interesting: people have complained that 4K video playback is choppy. Well I've tried everything I had in my library: 4K HEVC 8bit, 10bit, 4K H264, and it played them perfectly. When I have time I'll try playing the files for a longer period to see whether the fans ramp up, that's the one thing I really hate in computers (hence the iMac in the first place). I'm yet to try Final Cut Pro and Photshop to see how it handles those. So for all of you guys afraid of the 4ghz heat and noise, don't be unless your daily tasks are always cpu intensive, I'm sure that's where you might here the fan.