If you’re looking for a good camera bag for the Digital SLR and the lenses you got for Christmas, go read this article. Great advice in the article and in the comments.
I personally use three bags, depending on my needs for the day:
Case Logic SLR and Computer Backpack – I use this as my daily camera and laptop bag. It holds my Camera Body, three lenses, my flash, and laptop with chargers and iPod.
Tamrac 5612 Pro 12 Camera Bag – This is my all-purpose, carry everything with me bag that I use when I’m taking a long trip and want all of my stuff with me. Ample room for two camera bodies, assorted lenses, flashes, batteries, etc. All around great bag for a semi-pro or pro photographer.
Tamrac 5574 Expedition 4 SLR Photo Backpack – This is the first backpack I bought for my camera setup. Long story short, I don’t use it much since I got the Case Logic bag, but, it will do a good job for you, if you don’t need the laptop piece (which is what I wanted originally).
