Hey Everyone

I am looking at getting a 70-200 2.8 (canon) I was thinking of getting the one through the sponsored site on here they have a IS version going cheaper due to the new model coming out. But i'm wondering is it really worth paying the extra for the IS? I think i worked out getting the standard 70-200 from a grey importer is about $650 cheaper than getting the IS price reduced one. (thats if its still available)
I really have no idea should i spend the extra and get the image stabliser or save that money to go towards other equipemnt (as i do have a few things on my list! hehe).
Dont get me wrong if its worth it i dont mind paying the extra..but if its not that great of a difference i think i would rather put the extra into something else.
Any advice would be much appreciated!