hello
i do agree with the coments of the fuji (they do look abit boring, good pics though).
i've also looked at the 850is and the 900ti, i choose the 900 because of the dpreview stating better picture Quality.
however dpreview don't really rate these two camera very highly.
i returned the ixus 900 and brought the fuji 31fd and a ixus 500 on ebay, both for the same price as the ixus 900.
i was abit picky with the pic quality and the cost of the camera itself, a few hit and miss pics.
you might be totally happy with a 850is or a 900ti, besides they've sold bucket loads, 850is the most. try looking for a 800is.
oh one more thing, canon ixus 950 is due out soon. check out dpreview.
have a look here. you can see other peoples photo samples.
http://www.pbase.com/cameras/canon