Hi! We are needing to upgrade our big boy to a convertible car seat and I'm stuck on choosing between the Diono Radian or the Britax Marathon! Both have great reviews, a big difference is Britax only supports up to 65 lbs while Diono goes up to 110 lbs I believe. Just would like any input on either if anyone owns either of these! (Also, it's between these two because the base is smaller which is best for my Honda CRV.)