The 120-300 is a great lens. Lens rentals did have problems with it's AF breaking but they suspected it was how they were shipping it.
Canon does not service the older non-IS version.
Is 300 f4 IS an option?
no i shoot sports and IS doesnt do anything for sports such as soccer, baseball etc. the 300 f4 would not be a very smart choice as i would be needing a 2.8 anyway