child bike seat recommendations?

I haven’t been to the gym since before B was born.  Yikes.  My husband goes every day.  Haha.  I guess it’s something that I have to lug around a 35 lb 18-month old, but still I can’t wait to get back on my bike.  We used to go for bike rides all the time, even when I was extremely pregnant.  We are looking for a child bike seat, and the only one that they carry at REI (the only place we’ve looked so far) is the Topeak one.  Someone else recommended the Bobike seat to me, but I think I’m looking for a little more protection especially since Brandon is a squirmy guy.  Anyone have experience with this seat?  Or recommend another?