Evenflo Triumph DLX. It's a bit heavy and bulky, but the straps are on a track, so they always fit properly to the child, you don't have to worry about "is it okay to move them up yet?" and not getting a good fit.
Depends what age and size the child is DS has a cosco that goes from 22-40 with the 5point and 40-80 with the highback he'll be 2 next month and is 27lbs so he should be in the 5point until hes atleasr 4 DD has the safety first convertable carseat i cant remember the weight limits for rf ff and highback but hers also goes to 80lbs
The new Peg Perego Primo Viaggio is a REALLY safe seat. Also, the Foonf Convertible is one of the safest out right now (but it's REALLY expensive).
Chicco is coming out with their convertible in April!!
ETA: After literally hours upon hours of research on safety standards and settings for pretty much every seat on the market right now, we are using a Peg Perego Primo Viaggio until April, then probably getting the Chicco. If you can't wait until April, though, I would go with the Peg.
I had a radin and loved that seat. My SO got into an accident and we had to get a new one and at that point he was FF so i didnt see a need for it so i got something a bit cheaper for him. My daughter has a britax because we had a small compact car when i bought it but then we upgraded to a van if I knew that i would have goten her a radin.
We love our Peg Perego convertible, but it was pricey. If you plan to rear face for a long time, the Graco Size4me 70/MySize 70 is by far the tallest seat on the market for rear facing, and it's in your budget. There have been some people who have had issues with the harness on it not tightening properly though, so I'd save your receipt if you get one. By weight the longest lasting rear facing seats are the Foonf at 50 pounds (but it's EXTREMELY expensive), Radians, and the Peg Perego convertible. They both go to 45 pounds.