Yesterday I bought a 3.8 27inch iMac and upgraded the ram to 32 before turning it on. I will say that this machine is a powerhouse. I also have a mid 2013 MacBook Pro 15inch that still works like brand new. Granted, I don't really use it for anything heavy whatsoever. Also, this iMac will be used for recreational purposes only. However, I'm a tech geek and I just love having power. However, after reading these forums, I'm going to be a neurotic watching the temperature gauges. Based on everything I've been reading, the i7 runs much hotter than the 3.8 i5. I'm pretty sure I have nothing to worry about. However, what temperature gauge programs does everyone use? I'm currently using iStats, and I downloaded Intel's Power Gadget Who out there with a 3.8 i5 can calm my nerves right now.