Re: tallest rfing carseat
You may want to look at the new Graco Size4Me70. There is no RFing height limit. As long as the top of the head is 1" below the top of the headrest and harness height is at or below shoulders, it can be RFing. The headrest can be used at all heights RFing. There is a 40lbs weight limit for RFing on this seat. Looks like this thread on car-seat.org has a comparison of the Graco and the CA65.
More RFing pics here:
Diono is another brand to look at, as well as the Peg Perego, although I don't think that one goes quite as high as the other 2. I could be wrong though.
Comparison of harness tightening between Diono Radian and S4Me70.
Peg Perego vs S4Me70
And pics with kiddo with VERY tall torso in a variety of seats:
Cristina, Mama to Michael 03-16-06 , Nathan 01-16-11, and an angel 01-20-09
Go with your gut, follow your heart.