Ok, so heres the deal. I just walked away from the deal of a lifetime (or at least close to it). There was a guy on Craigslist selling his old Canon 75-300 IS USM for $100. I called him up and he said it was a gift with a film body years ago and just never used it because it was so big and heavy. So I met him to take a look at it to make sure it was legit. While there, he pulled out a 420EX that was still in the plastic bag and had never been used. He said he only wanted $25 for it! I had to run out and get some extra cash from my wife who was waiting in the car. I ended up giving him $150 (my wife only had a 50 and he didn't have change, so I figured we'd just call it even) for the 75-300 IS USM and a 420EX Speedlight. I almost felt bad doing it like I was taking advantage of him because he obviously didn't realize what he had. And no, it wasn't a scam, he was just genuinely uninformed to the value of his old camera gear and it turns out that he had someone else that contacted him by email offering $120, so if I hadn't taken it, somebody else would have. Ok, so enough with the story, here is my question, I already have a 55-250 IS. Which is the better lens? I just got the 75-300 tonight so I haven't had a chance to put it through its paces yet. I can definitely tell that the stabilization is better on the newer 55-250, but which is regarded to be the sharper (and all around better) lens in good light? I will most likely sell the one that I don't need, and since I got such a great deal on the 75-300, I could easily make a profit by going the ebay or amazon route.