I'm about to get my very first Mac (yay!) and I see I have the option of purchasing Pages/Keynote/Numbers for $19.99 each. How do these compare to the Microsoft equivalents? I'm a college student and will definitely be using Keynote and Pages plenty (may not need Numbers but may get it just in case) so I want to make sure I have the best program. So should I go for it? Or should I choose iWork or a different app?