Wah, what you're mentioning is like the killer combo of Canon L lenses leh
very expensive combo and very heavy combo to carry out..imagine all at once
I'm surprised you're not using a 5D with that combo
But yes, i have used the 70-200 2.8 a few times
.i don't own it but I agree the IQ is second to none but the weight for a walkabout lens just kills
.bearing in mind the TS is female (not being sexist here), but maybe i'm a weak male
, carrying that lens for a trip to the zoo for example, is REALLY tiring
unless you ahve a tripod
but then again, that means you ahve to carry that + tripod and walk around
even worse...