What do u think of the new iMac ? (OS X users)

Hi guys ,

I made a post , weeks back , about my doubts on OS X :

http://www.theverge.com/2012/10/2/3442300/some-clarification-from-os-x-users

Now iMac is refreshed which i was waiting.

What do you think of new iMac ? I mean , it is worth ? or shall i get old iMac at much lower price ? or Can u justify why new iMac is much better ?