Do you prefer the note Db or D if it is surrounded by these notes: G Bb Db (or D) F#? It is being used to resolve to a Dmin9 chord, and is being played on an off-beat as an arpeggiated line, a la Bill Evans style. please respond soon this emergency requires urgent attention
i can't really judge until i really hear the exact context for how you are using it, but it seems that the first chord would probably be happier with the Db in it instead of D. however, the way you explained it, i am still not sure if you are using it as a chord or playing the notes separately, i am getting mixed messages from your description. this is normal, it is very hard to describe music in words. an audio clip is worth 1000 words