Originally Posted by iND
WATCH OUT!
I don't disagree with you entirely. People have been begging for IS on the 24-70 for a while. Some chose the 24-105 over it just for the IS. I don't think it is necessary for shorter lenses but I do think on the 70-200 it is pretty important.
As far as the OP, I think you should buy what you can afford now and sell later in order to upgrade. You generally don't lose too much of the original value if the lens is kept in good condition.
You may want to consider a used 2.8 or a 4.0 IS also.
I could see a use for both the 2.8 IS and the 4.0 non-IS in one kit. The 4.0 is substantially lighter and is very sharp. On nice days in good light the 4.0 is a great, great lens.