The biggest transtion for me in going from my cute little Nikon Coolpix to my beastly Canon Xsi (clearly not to be confused with Mark Barbieri's new lens which is really the current "beast")

is the size issue.
The "cute" camera fit in numerous purses, pockets, and backpacks in its stylish tiny Vera Bradley tech pouch. The "beastly" camera needs its own home. It can't be tucked into anything. Thus, the pursuit began.
I spent half a day researching bags online: reading Dis posts, various photo blogs, and online camera bag sites. I selected the Lowepro Slingshot 100 and added it to my Christmas list. Having wonderful parents, it was beautifully gift wrapped, and I excitedly opened it. My enthusiam waned. I tried the bandolier style (which was why I liked it; quick access to my camera) and it wasn't comfortable. This bag must be better for men than women (use imagination here). However, I like that I can fit the camera, a couple of lenses, cables, cd's and papers. So, I decided to keep it to house my humble collection (Xsi, 18-55IS, and 55-250IS) knowing that I probably won't be using it to carry my equipment.
I have too many bags (purses, duffles, totes) so I determined at some point that I was not to purchase more unless I had a specific need. My new SLR created the need. The Lowepro wasn't going to cut it, so I went back to the laptop.
I looked at more bags and ordered the Mountain Smith Quickfire Med. This would hold my camera with the telephoto lens on it when I need it for the soccer season and will hold it with its every day lens when I don't need the telephoto. (I am already struggling with the bulk of the camera; I am not quite ready to regularly carry an extra lens.)
The Mountainsmith arrived. uh-oh it's big too. It is oddly shaped if I am not using the telephoto lens. I resolved that it was okay and would do. I took the Lowepro to a birthday party with an extra lens

. Not loving the Mountain Smith or Lowepro.
Now, a month later, I am itching for the right bag again. What am I going to take to Disney, afterall? I decided to try the Crumpler Million Dollar Home. Alas, which of the bags is right for me. Baby Bear's, Momma Bear's or Pappa Bear's? So, I ordered a 2, 3 and 4 million dollar bag from ebags.com - free shipping and returns!
This is my assessment. The 2 million is small; its cute. I could fit my camera in, but the strap would have created a tight fit. (This raises another issue - what to others do about the straps when they put their cameras away?)
The 3 million is nice. The camera fits; it has a little room and I can fit my cell and/ or iPod Touch in the little pouch. Certainly my AP and KTTW will fit too.(oh, and an extra battery and SD card.)
The 4 million is just slightly bigger than the 3. It isn't a huge difference, but I considered that I might be able to fit in a couple of other items. It could be a purse too... After consideration, I determined that my thought was silly. I wasn't going to put purse items in the pouch with my camera. However, the decision was made when I put it over bandolier style and the strap was much wider than the 3 million.
Overall, what drew me to the Crumpler is the look. It doesn't look like a camera bag. I was a bit concerned about the lowepro sitting with the extra lens on a chair without me. It wasn't comfortable enough to wear around with the camera on my neck (or for that matter without the camera.)
Additionally, a nice feature of the crumpler is the silencer flaps for the velcro. The bag has a latch which I prefer to the velcro.
I hope this helps anyone looking for a bag who is new to a "big" camera. Although I really miss the size of my cute Nikon camera, I wouldn't trade my remarkable Canon.
So, I currently have two bags (three will go with UPS once the snow allows

). I know this is a good start to the collection I will build over the years.
Debby