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 :)
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.
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.