My wife wants to buy an iMac, but according to the Macrumors buyer's guide page there's only an average of 1 1/2 month until an update, so I've advised her to wait. What kind of update might be expected? The usual stuff (minor speed bump, slightly bigger hard drive etc.) or stuff really worth waiting for (Blue Ray burner etc.)? She'll be using it for regular stuff like email, web-browsing, word-processing etc. She basically just needs a reliable computer (unlike her old PC) for everyday stuff. Should she wait?