I have a query and I'm sure it's probably been asked before, but please bear with me. I am ordering my first L series lens. (I'm excited like a 4 year old at Christmas) I've noticed the lens I see consistently, when people list their equipment, is the 70-200 f2.8. You probably now know my question. On Amazon the 2.8 without IS is about 1350., with IS is about 2300. Is the IS worth that much extra? Unfortunately, I still haven't found that elusive money tree, so I'd like the dollars to count. That extra 950 could go for more "camera stuff". Don't mean to sound chincy, but that's a lot of money. I've churned this around in my brain for weeks now and keep going back and forth. Currently the non IS is in my shopping cart, but I'm trying to make sure. After all, I'm female, that means I can change my mind and ask for directions. Thanks in advance for any input, it is most appreciated.