Space wrote in post #3916127
I've been shooting for more years than I care too remember. A lot more film than digital. I can always find a need for f/2.8 rather than f/4 but, do you really need IS. I've taken shots handheld at speeds I thought, there's no way i'm going to get this shot. But I do. Is IS really worth the extra $600.
"I've taken shots handheld at speeds I thought, there's no way i'm going to get this shot. But I do. "
*sarcasm alert*
Do you really expect us to believe that?
You obviously have not allowed the yummy Kool-Aid to be fully absorbed by the part of your brain that is responsible for rational thought
. Take another pull son, you sound like one of those pesky analytical types that refuses to be assimiliated.
Same here.
There are now cars for people that find difficulty in parallel parking. I don't want one of those either.
$500 to $600 means different things to different people just as not everybody has the same photographic skills or requirements.
Some find the 70-200 f/4L IS to be the greatest lens on the planet. I'll take a f/2.8 non-IS anyday, but that's just me. I LOVE that Canon makes 4 different 70-200L lenses. That way there's more of a chance that they make the perfect one for you, me and anyone else interested.
Now what I really need is a fully decked out Hummer with giant mud-whomper tires on it because I might be driving down the freeway and see a pretty girl waving to ME (of all people) from the top of a muddy hillside... Boy, then I'll be sorry if I didn't have one
....... 
In this case "worth" is an extremely subjective term. But hey, if you just want it, come clean and just go get one.
Canon 20D w/grip, 300D, Powershot SX100 w/HF-DC1 flash, Canon 70-200 f/2.8L, 85 f/1.8, 17-55 f/2.8 IS, 50 f/1.8, 580EX and some other stuff...