I've looked at the SX100IS I didnt like the look of it. I am now to the point where I am not sure If I want to get the S3 IS, or S5 IS. My main thought is..if I've never had a camera like that before, is it best to go with the lower model first..which is hte S3 IS vs. the S5 IS, or just go for the better/newer model in general?