Im trying to get into dslr's. I'm looking on eBay and there are some really awesome and affordable D60 kits for sale. Most come with Nikon lenses, some come with Sigmas. I may have seen 1 or 2 that come with a Tamron. Anyway, I've Googled up and down and I can't seem to find a definitive answer. I know it's better to buy the body separate from the lenses, but for a newbie like me, I'm sure the kit lenses will be just fine. And I want to stay around $600-700 for now. So, with that said, should I go with the Nikon lens kit or a kit with a Sigma lens? Who makes the better lens?