I'll post some pics later maybe, but just received my iMac Retina!
It has all the upgrades (i7, M295, 1TB SSD, and 32GB ram..) I ordered with base memory, I grabbed some from Newegg, much cheaper!
Its the VESA mount model, so took me a few mins to position it right, as well I have 2x27" monitors hooked up.. this of course eats up both TB ports, and 2 USB ports. I may change this config later, not sure if 3 monitors are required as they were with my PC.
I used it for maybe an hour or two last night, setting up MS Office (with new Outlook client), and connecting iTunes to my music share on Windows server.
Installed Battle.net client, but haven't tried WoW or D3 yet.
So far, its quite fast, quiet.. and that screen.. to quote the Takei.. oh myyyyyyyy! I have the slider all the way to the right "more space", and everything is bootiful! Hopefully tonight I will have time to fire up Photoshop and edit some pictures.
In short, I'm happy with my purchase, and I am looking forward to getting to know all the new stuff that connects my iOs and OSX devices.