OK, I thought I was confused about which camera to buy. Now I seem to be confused about where to buy it! I'm in the market I think for a Dx40 or XTi. I've looked on the internet, and at Costco. The prices online are EVERYWHERE and the package options are endless. It seems I could get the camera for $1000 or $200..... So first: 1) Who is a reputable seller? Should I just go to Costco (Package w/ two lenses for 900-1000) or is there an online price that is better? 2) What accessories should I make sure I have so I don't get my camera and then find out the next day I need to spend a bunch more money? Thanks!!