Suzuki
I have a 7 1/2 year old who is playing violin and has since she was 3 yrs. 2 months. Suzuki. For the most part I LOVE the pedagogy of Suzuki, and especially his musical ideals and his acceptance of all children being able to learn and love music. Our goals are also that our children will learn to love music and appreciate it and have that outlet as they get older.
DH and I both have music education backgrounds, band, orchestra, piano, no Suzuki. I started dd #2 on piano non-Suzuki, and I'm finding it hard to stay motivated. It's cheaper (Suzuki has not been inexpensive in our experience/places we live), but after we stabilize after buying our house, I'm trying to convince dh to start dd with another (hopefully Suzuki) piano teacher. DS (3rd) is pretty much a preTwinkler now, 2 yo, loves the songs, can name parts of the violin, etc. I don't know for sure if he'll choose, and we may wait until he's 4 (current teacher accepts at 3) or 3 1/2, but we'll just have to see how it all goes together.
The 2 different programs dd has been in have made adaptations to the Western style of education/independence, such as learning note reading and theory sooner. Overall it is excellent. It can be done well or not well, so do a lot of research into the programs. I had 2 friends with Suzuki training when I did my research. Both our programs (diff. geographical areas) have been fairly traditional Suzuki. There are some Suzuki teachers who "take the students who none of the other Suzuki teachers will take."

Depends on your kid.