Well look at that, OS and HSM together. I thought a while back Sigma said they couldn't do that. I like the look of this a lot. I was still considering the original Bigma, although sliding towards favoring the Canon 100-400 because it had IS. I assume the price point on this sucker will be higher now, I hope not too much so. That's a really attractive focal range, I await image quality tests with great anticipation.