Hi guys and good evening I've been busting my head for a week now over this but still can't decide what to get, so i decided to turn to MR. I've been saving up for the 70-200 f4 L IS for a while but now that i finally have the cash am having a few second thoughts. The problem is that the non-IS version costs almost as half, and with the spare money i can also get the 100mm f2.8 macro that i really, really like. So i want to ask people who have used both lenses, is the IS really worth the $500? I've never used a lens with stabilization before so i can't form an opinion. It will be a while until i'll be able to afford another lens so i want to make the choice i won't regret. So can you flip the coin for me? 70-200mm f4 plus 100mm macro or 70-200mm f4 IS? Thanks!