Hi stalindadrummer! Here's my thoughts on this: The choice to go up or down when transposing a song depends on the sound that you're getting compared to what you looking for... One thing to remember
is that the chord in its inversion may give you a little different sound. Playing too many notes on the lower
register of the keyboard might make a chord sound "muddy"; on the other hand, playing chords on the
upper register has a more "tinny" sound. So my suggestion is to find the register on the piano or keyboard
that sounds good, and play the inversion of the chord that sounds right to you, and you're on your way!!
Hope this helps you... BroAllan