Canon 70-300 IS USM vs 70-300 L IS USM

I think 70-200/2.8LIS2 will save you money at the end of the day.

the old none IS version was very good. same image quality at significantly lower price but the new one is from another world. for 70-300LIS, I'd rather call it "semi-L" one. the quality is somewhere between L and non-L ones.