I'm looking to upgrade to some faster lenses. I've found some and the reviews seem good, just wondering if anyone has any experience with the following lenses: Tamron AF 28-75mm f/2.8 SP XR ZL Di LD Aspherical (IF) with Built-In AF Motor Sigma 24-70mm f/2.8 EX DG Macro Aspherical Large Aperture Standard Zoom Sigma 70-200mm f/2.8 DG HSM II Macro Zoom Lens Nikon 85mm f/1.8D AF Nikkor Lens Tamron AF 17-50mm F/2.8 XR Di-II LD SP ZL Aspherical (IF) Zoom Lens with Built In Motor I'm slowly trying to build up an aresenal for indoor sports shooting and maybe weddings way down the road. Any other recommended lenses would be great. I can't really afford the $1000+ Nikon lenses right now. Thanks for any input you may have. Right now I have a D40, but will be moving to a D90 pretty soon as well. Thanks Again.