I'm on my new 27" iMac (3.4GHz core i7) and when I type - a word document, on a web site or even for the title of this post - my system either gives me the spinning wheel or the words I type are delayed. I currently have Firefox, Word, Chrome and Safari open. Firefox is using the most % CPU and Real Memory (1.59GB). Would installing more memory help this? I have 4GB installed right now, but I have been thinking about adding more (16GB).