Hi PK. If you need the pull of 300mm fine, maybe you take wildlife pics etc. If you don't then the 18-200mm lens is a cracker, I've got one and I'm very pleased with it. But as Wave suggests, if that's outside your budget then the 18-105 is a good starting point which will allow you to hone your skills. My 18-200mm is the Nikon lens, but all my others are by Sigma and I'm very pleased with image quality, they are cheaper than Nikon but certainly not inferior. All the best, Mike.
Humility is an endearing quality and gains many friends, whereas arrogance loses them. Mike, 2012