It really depends on what you like, and what your going to do with it.
The best spinning sabers are the Luke ROTJ and the Obi-Wan.
It depends if you like Green or Blue, but i think the Obi-Wan hilt smacks the poop out of the Luke ;D
My personal favorite FX is the Anakin. It is a Beautiful hilt (my favorite) It has a blue blade (which i like) and it is not that bad for dueling. Not the best, but its alright.
If you want a singe sith blade, Then you have got to go with the Vader. The sounds are menacing. If you have the money, Go with the Double maul.
Its all based on oppinion my friend. ;)