I've made a promise to myself to get the best glass possible in the future. With that in mind, I have the following: Tokina 12-24 DX Nikkor 18-70 DX (thinking of selling this, as it has sat unused for months) Nikkor 24-120 VR Sigma 30mm 1.4 Nikkor 50mm 1.8D Nikkor 80-400 VR I'd like to get one of the great wide/midrange zooms - 17-35, 17-55, or 28-70 - as my next purchase. Given that my Tokina is super sharp and covers up to 24 mm, am I best off going with the 28-70? Sometime down the road I'll probably get a 70-200VR. The other one that looks attractive is the 17-55, since it covers a large area. Is the 17-55 more 'useable' on a digital body than the 28-70? Anyone own both eek: ) and use them on a digital body? Also, size and weight are important to me, though I realize those will be sacrificed if I want the best. But are there any differences between these? Thanks in advance for the advice.