Currently shooting a Rebel T2i with EF-S 17-55 f/2.8.

My son has started youth hockey. While the 17-55 was great if I was skating with him during practice, 55 mm leaves a bit to be desired from the stands. So, I think the 70-200 is what I need. I also think that for rink lighting, f/2.8 is needed.

Now the big if. IS seems to add about $1K or so to the price. In my application (hockey action shots...now pee-wee slow but soon to increase in speed rapidly), is the lack of IS a big deal? If not, it helps me immensely in negotiating with the CFO of my house.

Thanks in advance.