I'm looking to buy a digital camera for the imminent arrival of my first child. From my research, I like the Optio 555 for its zoom and manual control (more important to me than the mom-to-be, who will only ever point and shoot) but am concerned about its speed. I also like the Elph S400 for its (relatively fast) speed and ease of use. Picture quality is actually the most important feature to me, but I haven't been able to find any head-to-head comparisons. I can't decide which way to go - does anyone have any thoughts on which camera is better? Thoughts on other cameras would also be appreciated, but from my research, I'm really liking these two. Thanks.