So many great replies! Thanks!

Right now I have no kids - we're getting ready to have our first and plan on having 3, hopefully. I definitely want them in front of me, especially if I'm taking more than one somewhere. It's also important that I can bolt in an infant car seat, since I don't want to be without my bike for several months.

The CETMA is lovely! I'm in the UK, though. Shipping would probably be really, really expensive.