Hi guys. I just upgraded from a D40 to a D90. I purchased the body only, and gave my D40 w/18-55mm to my gf. Currently the only other lenses i own are the 35mm f1.8 and 55-200mm VR. I'm looking for another wide to mid range telephoto for my D90. I've been looking at the Sigma high speed lenses. Including the 18-50mm f2.8, 24-70mm f2.8, and the 28-70mm f2.8. I was wondering if any of you guys have experience with these lenses, in terms of build quality, image quality etc. I also plan to get the Sigma 70-200mm f2.8 as well. Any suggestions guys? Any input would be much appreciated. Thanks in advance! :mrgreen::mrgreen::mrgreen: cheers!