so far I have two dilemnas... 1) which screen size, I have a 22" now, the 27" feels too big, but everyone says go big or regret it, thoughts? 2) new iMac vs current model: some say to wait for the upgraded HD and thinner bezel, while others say with my needs (basic email, browsing, office programs) save the money and go pick up the "old" model today. 3) any software I must have? 4) anyway to pay less than retail (crazy I know)? any other tips for me?