Well said. It is branded as an all-in-one "desktop" computer, and pretty sure most of us here disappointed in GPU do not expect some SLI configuration with liquid cooling or tons of fans. I just wanted a solid desktop GPU to do moderate gaming along with all the other things I do with a desktop - as opposed to a laptop.
The top end GPU in the new 27" iMac will be able to minimally run most games out today with ultra settings at 1080p and might pull it off for some at 1440p. That doesn't qualify as "moderate" gaming for you?
I think you probably need to just bite the bullet and get a real full blown, nothing held back, state of the art gaming machine from Falcon Northwest. This amazing computer will however set you back over $17,000. but it is among the very best possible options as I configured it on the planet earth today.
Check it out for yourself. This bad boy will do "moderate" gaming and more but it is going to cost you.
http://www.falcon-nw.com/desktops/mach-v
Go to the configuration page and max it out like I did. Watch the price rise to astronomical levels but there will be no compromises made. This machine is pure, unadulterated state of the art for computer gaming.
This here was the system I configured for myself. As you can see, it easily blows the top spec iMac completely away! It will cost a little bit more though and you will be stuck running windows instead of OS X, although that problem could be solved by also buying a Mac to go with it.
Here is your customized Mach V system configuration.
System Details
Chassis
ICON2 Exotix - Any Single Color
Chassis Logo Insert
White Light
Chassis Fan Kit
Performance Fan Pack
Sound Dampening
AcoustiPack Sound Dampening Foam
Power Supply
1500 Watt Modular
Motherboard
Rampage IV Extreme
Processor
Intel® Core i7 3960X 3.3GHz
Processor Cooler
Liquid Cooling - Mach V
Processor Overclock
No Processor Overclock
Memory
Elite 1866MHz 64GB (8x8GB)
Video Card
Quadro 6000 (6GB)
Video Card 2
Quadro 6000 (6GB)
Video Card 3
Quadro 6000 (6GB)
Monitor
30" 2560x1600
Sound Card
On-Board Audio
Speakers
Z-523 2.1
Networking
On-Board Ethernet
Hard Drive
m4 SSD - 512GB
Hard Drive 2
m4 SSD - 512GB
Optical Drive
24x DVD Writer
64-Bit Operating System
Windows 8 Standard
Office Software
Office Professional 2010
Warranty
3 Year Warranty - Mach V
Shipping options
UPS Ground : $240.10
UPS 2-Day : $624.03
UPS Overnight : $966.24
USPS (APO Only) : $915.00
UPS 3 DAY : $366.00
Total System Price: $17140.75