I'm still searching lenses...not because I'm not happy with my newly acquired Nikkor 50 mm f/1.8 (although I can't get it to take a shot with anything but a stop at 22) but because right after I bought my new lens, a bunch of people at work went together and bought me a $60 gift certificate for RitzOnline.com. Now I have a reason to shop and have no idea what to get! Eventually I want a better, faster zoom lens for my D70 than the lens I got with the body. I mostly take portraits and do other such set up photography like weddings and graduations, etc., so the 50 mm works great for that. I wanted something comparable to the Canon L lens, like the Nikkor 28-70 f/2.8, but I also wanted to ask your opinions on other names, such as Tamron and Sigma. Would a Tamron 28-75 f/2.8 be comparable to the Nikkor or should I just wait until I can afford the $1500 Nikkor? Are any of these other brands a good investment for portraiture photography?