My Canon XSi with 18-55 IS kit lens is on the way along with a 55-250 IS. I plan on getting a nifty-fifty (50mm f/1.8). I've been reading where many leave the 50mm prime on their cameras, so I was wondering if it might be a good idea to sell the 18-55 IS unused and put that money toward something else like a bag, tripod, flash, polarizer filter, better lens fund, etc. I'm a beginner, so my shooting will be varied. Some indoors with family, sports, concerts, travel, landscapes/wildlife, etc. I'd appreciate your thoughts. Thanks!