I have £1600 to spend on a new apple (my first one ). I was going to get a 20" imac but i've also realised that I could probably also get the low end single processor PM and a Dell 2005FPW 20" monitor for the same price. Which one would you go for ? Is the single processor PM going to get a small update as well or not ? If the 20" imac is going to 2ghz and 512mb RAM surely the single PM is as well.