If I were you I would wait for the DA-50 to come out. The 3W 50 would be almost as good, but its not a DA Fox Brisson and FPE (first place engines) 3.2 would also be a great engine for it. The AW 29% is a great plane. As far as sound goes, I'm not really sure. The engine will for sure not sound just like a DA-150, but proped right it can sound really close.