in order to maintain happiness you will need to make sure - never get near any previous generation of iMac 20" or 24".
My second white iMac 20" arrived today. I paid full price for it and I am very, very happy! When I get near a new one it makes me even more happier.
Could you be more specific here? I have a 20" White iMac 2.0GHz and was thinking of upgrading to a 20" Alum 2.4GHz iMac. From yr msg I gather you feel this is not an upgrade at all?