As its based around getting your kids I would aim for one that turns on fast.
silly at it sounds it would come in usful as most moments happen and having to wait 10-20seconds for something + to tuen on and work means u miss it.
Hi fps would be amother, you would be surprised how many cams bler fast moving objects even today.
I'd say go digital, the advantag sided with digital for editing recording to a DvD format over tape.
Thought quality is the other way still.
I'm drunk atm and my info is based on uni from a couple years ago now but still, ill post something more usful for u tomorrow if needed.