It's really just meant to be an everyday, casual camera, which is why I don't want it to be too big or too expensive. The thing is, everyday for me also means it has to keep up with my very active (and fast) 2 year old. To give you an idea, the Klasse AF speed could not keep up at all, while the Hexar AF could comfortably. Unfortunately, the Hexar is not exactly compact. You see, I just want cheap, small, and super fast AF. Not too much to ask, is it?? 😉
EDIT: I do the half-press the shutter as well. I was not looking for fast "full press" camera. I was looking for a camera that was fast to pre-focus on half-press with none to negligible lag on full press. /EDIT
Zone focus is an option, I suppose, as many have pointed out. By the way, thank you all again for all the suggestions. Much appreciated.