How would Office 2007 cope?
That's all I want it for.
If you're just running office on OSX (without Office 2008), have a look at Crossover - quite abit of stability for running Office "natively", without the need for Windows OS installed, saves space~

Otherwise, just stick with Office 2008, got the Student Edition and it's much much better since 2004's, still takes a good few second on the splash screen but it works speedily when ready.