If it helps at all, I went with the 2.8 IS USM version as I cannot for the life of me keep my arms/hands still and could use the extra help. Even with a quick shutter speed, IS comes in handy when hand holding. But agreed it does not stop subject motion.


There's really no easy answer but possible recommendations. It comes down to preference. I knew going into the purchase that I needed the IS and that travelling around with a tripod/monopod was wishful thinking as there are moments where you would have wished for the IS version.


My $0.02 worth...