Sony A-100
I also use an A-100. My previous cameras were all 35mm. (In order from most recent to oldest) Minolta Maxuum 7, Canon A1, Canon Ftb, Minolta SRT. I was sold on the A-100 for three reasons. It uses Minolta Lenses. It has a good 10.2 megapixel sensor, and it has a certain degree of image stabilization built into the body. I am very satisfied with image quality. On bright days I hand hold it, shooting at 500mm, 1/1000 sec. and ISO 100. The problem with using a tripod to reduce vibration is that setting it up scares the crap out of the birds, and often by the time you get it set up it is too late. However, the main drawback with the A-100 is that it has difficulty quickly autofocusing the Tamron 200-500mm lens I use with it. This is a real problem with birds in flight, which I end up needing to focus manually. I plan on getting a A-700 in the near future, and I've read they have redesigned the AF system, etc. If I were you, and I had the extra money of course, I might shy away from A-200, or A-350, and go for the A-700. It is a much more robust and capable camera. My gallery on BirdForum also shows samples of the capability of the A-100