a friend has the canon 75-300mm f/4-5.6 lens and i like it and would like to add it to my 18-55 kit lens. canon offers this lens with and without image stabilization. will i notice a huge difference with the IS feature? i'm just an amatuer. i dont use this for anything other than hobby shooting. i am not looking for anything more than the additional range, but if the IS will provide a huge increase in image quality, then i want to consider that one. the IS model is much more expencive. but is it worth it for me to buy it over the non-IS version? ive shot a few with the non IS but dont have access to the one with IS. not sure what to get.