I am looking at my next upgrade thinking of going in a direction that is non-traditional to me and would like feedback from others who may have gone this direction. Posting here instead of the Buying Advise forum because I want to target the most laptop minded people I can. With my current usage and equipment I have a 2011 27in i7 and a Late 13 2.6 13in rMBP. When I buy a PC I tend to buy overkill for my needs then keep the machine for 4 years. I do not need massive amounts of computing power, my iMac is still overkill for power, but I am in front of the PC for 8-10 hours a day and have a great appreciation for quick. I also only need a laptop rarely, just enough to have one. I do however use my laptop on the sofa, in bed and general use when I just want to get up from the desk. My usage is mostly Numbers, Pages and web-based applications. I rarely watch movies on either machine and the only game I play is Classic Everquest on an emulated server, basically a Macbook Air could cover my needs. Bootcamp, my iMac spends several hours a week in Windows for a few programs, but again, nothing that requires a lot of horsepower. Now to my thought. When the next gen rImac is released I have it in my budget to upgrade my 2011. Again, overkill for what I need, but when you stare at the thing for 8-10 hours a day, I want my life to be as pleasing as I can make it. My current cycle has me spending roughly $2.5k on a new machine every 2 years replacing one or the other. I am considering selling my late 13 rMBP and instead of getting an iMac, buying the next gen 15in rMBP, docking station and a 27in 4k monitor. Just running 1 machine. I realize it would be more expensive to get into that set up to start with. My thought is using my saved desktop money + money from selling the rMBP would cover the project. Then in the future I will just be replacing a machine every 4 years and updating a cheaper monitor on a different cycle. In my mind this will have a total overall cost savings while still providing PC power / quality / ability that I am accustomed to. I have 2 main concerns with going this direction. 1. Machine longevity. With my iMac, it just sits there with minimal moving parts. The Thunderbolt cable is connected once a week to sync data, there is just no wear on it. With the docking station set up it will be in clam shell mode most all day but the Thunderbolt port will see movement every day. Heat. I am confident in my ability to provide a clam shelled laptop adequate air flow to dissipate heat. The iMac however is much larger with more surface area to dissipate that heat. I have the concern that the iMac may be better suited to handle 8-10 hours daily use from a thermal standpoint. 2. Just worried Ill spend $4000 to get into this project and wish I had a desktop. I have no solid reason for this concern, I have thought it through several times and come up with no valid negative thought. Its just the concern of going a different direction. I have considered the xtra cables with the docking station. That does not concern me, I have Macs because I prefer Mac OS, has little to do with the all in 1 design. Thoughts? Has anyone else been in a similar situation then was happy or had regrets?