I don't wish to start a PC v imac fiasco so please don't let this thread go that way.

So, lets say I was giving thought to the purchase of an imac to replace a PC laptop. I don't have the experience or wish to go down the custom build process either so that option has been ruled out for a number of reasons.

What is the minimum or even ideal specs in terms of processor.
Does Duo Core do the trick (currently on special as being replaced by i3) or is quad i5 necessary. I do not plan on gaming as far too much to do to spend time gaming.

Probably only use Elements and/or Lightroom

Interested to read some thoughts...

thanks