You should go with what ever bolt YOU think is better, otherwise you will always be second guessing YOUR purchase.
With that said, if you truly understood the technology involved you would believe anything other than dart is a complete waste of money.
But really it sounds like you already know what YOU want, so this whole thread is kinda useless.
"There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die." -Hunter S. Thompson