photogdave
Shops local
Thanks Don. That's a really useful real-world comparison!
AL:
You are suffering from a poor choice of glasses and not a screen size. Get some professional advise on that one. There are lots of products that work great. I'm viewing a 27" screen with lined trifocals without any issues at all. Glasses are a tool, but you need the right tool.
Rob, if you're near an Apple store, it might be worth a trip there just to get another perspective.
The shiny screen concerned me before I bought my iMac. But, it really has not been an issue. Tilting the screen, and not necessarily very much, works. However, it is rather reflective if there's light coming from behind you.
A comparison of the specs of both the iMac and the Mini at apple.com ought to resolve the "which is more powerful" question. Pay particular attention to drive speed. I'm also not sure what video card is inside a Mini these days.
Good to know you can haul your iMac into an Apple store and get the screen replaced if it ever dies. (If you get one, do save the box. Makes it much easier to haul around.)
One thing you cannot do with either the iMac or the Mini is upgrade the hardware. If that's in your thinking, going for the Mac Pro might turn out to be a smart move.
Hmm, I have no idea what GPU or HDD mean. I do have a Shutterbug article here from September '08, in which the author says he tested Aperture by running it on the 17" Macbook Pro. He said that Aperture runs best and fastest on that one; and that certain features of Aperture are available only on the Macbook Pro. But of course this article is now 14 months old. Has anything changed since then?
What do GPU and HDD mean?
GPU=Graphical Processing Unit
HDD=Hard Disk Drive
Both the GPU and the HDD will have a significant impact on real-world performance. Hence, iMac>Mac Mini for photographers.
But MacPro is even better, but $$$ more than iMac.
For me, iMac was the best combination of performance and value for the money (now especially true because of the new 27" LED LCD)