Honestly, I don't think you can go wrong with either. Now personally I have never owned a whip but have borrowed one for a few months, and I do own a taipan, and owned another.
I am self admittedly A JD Berry fan boy, I believe James to be one of the finest bowyers to build a bow. My 62" taipan is the bow by which all others are measured. Quick, silent, forgiving, and no hand shock that I can tell. My taipan is the quietest bow I've ever owned or shot, and tha includes the 25+ ASL's that I have owned.
Now with that said, James is focusing on his ASL's so I'm not sure if he is Even taking orders for the Taipan. You would need to call to find out.