Thinking it's time to replace my old Canon SD1000 P&S... It is terrible in poor lighting (particularly flourecent light for some reason) so I am looking for something that takes better pictures. I am considering the Nikon S9100 or the Canon SX230HS. Any opinions or advice? I know very little about cameras. Any tips for improving picture quality in bad light? My current camera has presets for night shots, etc., but they almost never work. Anything I can adjust manually?