Hi Montunoman
I like you, searching for the "Latin Arranger" too.
I purchased a BK-5 and returned almost inmediatelly: The sounds wasnīt bad at all and some styles were great, but the latin styles arenīt that good at all. The other thing is, this keyboard is so light (keys and weight) that I almost feel I was broken it in the next chord (Iīm a classical trained pianist, heavy hands here...).
I used to have a Tyros2 too, a big toy, literally!! (a toy I mean).
My friend, is just my point of view, but I suggest you try those keyboards for yourself.
Good Luck!!
Jo Martins