Hey all, thanks heaps (as always) for your replies.
I started off with the 18-55 and 55-250 kit lenses and got rid of them and got a 24-105L (very impressive lens) but I've found despite the upgrade I've noticed I'd like to zoom more, but not often enough as to justify a $1900 lens. I've found the 100mm end to be good for portraits etc but I've (obviously) still got to be a bit of a distance from the subject. The 70-200 was top of my list but I'd also like more zoom, but I don't want to "double up" if that makes sense? Meaning I dont want to get 24-105, then 70-200, then 70 -300 etc. Due to being on a bit of a budget I've wanted to keep 2 lenses, one as a walk around and one for my zoom stuff (I've also got a 60mm for macro stuff).
So, the 70-300 non usm is definitely within budget but I dont want to sacrifice image quality... but at the same time I'm trying to justify spending an extra $1k on what could just be a small jump in image quality... and then at the same time it's not a lens I'll use often. (I live in Sydney, everything is "in your face" and zoom is only necessary going out to parks etc