We have a marathon and a radian 80xlt - dd is probably a bit less than an inch away from the top strap being too short for her. we used to have a frontier, before the radian but it was in a car that was totalled and then replaced with the radian. i know the new froniers have higher strap height and i found one on sale for $205 free shipping and no tax today. What I was wondering is whether anyone has heard about any new seats coming on the market that will be better than the frontier, in its class, in maybe the next 3ish months? When I bought my first frontier, like a month later the radian 80 came out and i kicked myself for buying the frontier before I needed it....sort of don't want to make the same mistake. dd is 4 yrs old, 45" and 46lbs. definitely not ready for a booster...i really want to keep her harnessed for as long as possible - we actually just forward faced the radian last week! Just moved the straps up to the top notch on the radian too....so i guess probably if she keeps growing at the rate she has been then i will really be needing 2 new seats in the next yr. I hate buyers remorse!!