Re: 300 $ to blow on a china girl.....
I'd go with the Dax (or similar)balanced bottom and port the top end for a nice wide powerband. That's my plan for the new balanced bullet I recently ordered from motorbicycleracing.
Keep the revs down without sacrificing rideablility.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.