I got the same decison headache. I am a newbie to photography and most of the time only taking pic of my kids. portability is impt, and 10X zoom is wow. But having 10X w/o IS is like not optimising the zoom capability if IS does help. Also, the total LAG is faster in C-2100 than C-700, which means u wont miss candid shots. As for prices, they both cost about S$500 in Japan, so make it even more difficult to choose. I seen the nite pics of C-700 in Tweek's gallery, not very good leh, but C-2100 also not much different. object does not seem to be very sharp. Are both cam good for nite shot? How about indoor portrait? I take pics of my kids indoor/outdoor, day and nite, which would be better? or other brands? I owns a S10 but the Zoom is lusy at 2X only. Was at Sammi cheng's shocking colour concert, sitting at the 4th row, really needed a 10X zoom then....