Free: Contests & Raffles.
Right now Canon and Nikon are really leading the pack in low noise sensors. Sony is the 3rd best though and is expected to be a player in the photography dslr industry soon. I'm not sure about the a100. There is a new rebel out for Canon. Nikon is nice as well. Or go with the Sony if she is ok with it. I personally think a camera is like a car, you need to test drive it as she may prefer one over the other. Take a trip to Frys or a camera store to try them out. When you find the one you want, buy it from a reputable online retailer like B&H so you get the best deal. Good luck.
Yikes, just saw the above post. I have ordered from them for over 18 years and have never had a bad shipment. I just got a shipment from them a few months ago and it was fine. They are the highest rated camera seller in the U.S. If you prefer Adorama, that's ok. They are not affiliated that I'm aware of. I have ordered from Adorama and they are fine. If something does come in and is damaged, they replace it for free and pay for everything. Can't beat that and it saves you a few hundred bucks over buying local. Always check out online retailers at resellerratings.com to find out if they are legitimate. ....