I'm currently facing this same dilemma. Our son is now almost 5 months so it won't be too many more months before we are looking to take him out on the bikes. I have the concern that Darth_Lefty pointed out above, being tall I'm always having to contort my body to make things work, I don't really want to have to splay out my knees for a front mount seat because then I will never take him out, but I also feel that interaction with him up front is much better and necessary to keep him more interested. Are there seats that mount to the font but are in front of the bars? Maybe mounted on a front rack?