Canon Camera Memory Upgrade Canon EOS Digital Rebel XTi? ok I bought all of this for $1074 that includes overight shipping is it worth it or did I get ripped off? +Canon EOS Digital Rebel XTi SLR +Plus 1 Sigma 28-70mm f/2.8-4.0 Lens +Plus 1 Sigma 70-300mm f/4.0-5.6 DG Lens +Plus 1 Wide-Angle Converter Lens [...]