So I was wandering around downtown Dallas a couple of weeks ago and, like the klutz that I am, tripped and fell and broke the lens in the title of this thread. Not that great of a lens, I know, but decent enough for wandering around with and taking random shots. Since then, I've been using my 50mm 1.8 almost full time, but really miss the wider end of the broken lens. Keeping in mind that I'm on a budget, what's the best, cheapest replacement for this lens? I'm open to buying another like it, if that's the consensus, but if there's something better, let me know. What about the 28-105 IS? I'd be losing a bit of the wide end, but would it make a huge difference? Any ideas?