I had posted a couple of months ago I was intending to buy a 17-55mm f/2.8 Nikkor this christmas. But I never saved enough money (and I really think it is just too much) and I'm currently debating which lens to get. I just don't like my 18-55 anymore. So my options are three (if you have any other suggestions do say them) - Keep the Nikkor 18-55 f/2.5-5.6 and get the new 50mm f/1.4 - Buy the Sigma 18-50 f/2.8 - Buy a Nikkor 16-85 f/3.5-5.6 I've read the Sigma is soft at f/2.8, and also the possible problems they might come with (front focusing, etc). I have a Nikon D40x.