There are plenty of guys running stock cranks making huge power, you might not need to spend that much on a HotRod crank, you might be way ahead fixing your stock crank for potentially 1/3-1/2 the cost depending on whats wrong with it.?
Also, if you plan on keeping the bike for a while its only a matter of time before your wanting mre power. Now is the time to have those cylinders ported, youll be amazed at the difference. They're already off the bike anyway.