I would love to buy a new iMac around turn of the year... but I do not know wheter this point in time is very clever or not. Current iMac was introduced August 7th this year. Recording to the previous update intervals I would bet for a next update early 2008 (Feb-Mar = 7-8month)? Am I right? What is realistic? Simple HDD and/or CPU upgrade? QuadCore? What do you think? Do we have to wait another 12 month until (Aug 2007-2008) next update?