so i'm looking to buy a Radian convertible seat for my DS who is quickly outgrowing his infant seat. i plan to buy it soon so i can install it this weekend. i see the XTSL on Amazon for $295. i have prime and an amazon visa so id' get triple points and very quick shipping..i just want to know if there is a significantly better deal out there? i have a Babies R Us coupon for 20% off baby gear items (incl carseats) but it's valid in-store only and it seems like the Radian carseats are only sold online (went today to my local BRU and didn't see any in the store).