I tried experimenting a litle more, and here is what I've found:

1. Real Track #487: Piano, Acoustic, Rythm Jazz Ballad Sw 085 sounds pretty good with bossa bass and drums.

2. Real Track #487 does not have the same stretching problem as Real Track #714: Piano, Acoustic, Rythm Bossa Ev 085. #487 sounds fine when stretched to 110bpm, but #487 sound terrible at that tempo - and virtually any tempo slower or faster than 85bpm.

I think there is something wrong with Real Track #487.

Andy