the A300 is basically the same camera as the A200,but with the A300 having liveview with the tilting screen,which can be useful if you want those low down shots without having to get down on your front to look through the viewfinder,or if you cannot see over someone/something in front of you.the A350 is the same as the A300,but having a greater resolution(14.2MP as opposed to 10.2MP).all are very good cameras,including the offerings from canon,nikon,olympus etc etc.....but canon have the best lens catalougue,with nikon probably 2nd.an advantage of having a sony is that you can use the konica minolta range of lens,which can be bought on e-bay relatively cheaply,although the prices are on the increase due to the growing popularity of the sony alpha range...
good luck in deciding
