Just bought a "amio Uno" for my son, suit for 0-4 years, the carseat is comfortable and not bulky at all. Very similar to Recaro, probably they are produced by the same manufacturer in Japan but the price got around $2K difference. Pretty good quality with reasonable price, good to consider.
I'm using "Recaro" for my baby. This is very good and comfortable. "amio Uno" looks nearly the same as "Recaro". If price is so much different, I also recommend "amio Uno" to consider.
I finally bought Pamio Uno. I check other carseats and I think Pamio Uno is the best I saw so far. I also check jp website and got a lot of good feedback. I bought it for about $2200, cheaper than japanese website. so happy :)