need a little help....

Some will say that the lighter the better. I'll say, middle of the road for a middle of the road build. Light flywheels have less inertia to overcome thus require less HP to move and that adds up to a little quicker throttle response.
However, the less the inertia, the easier it is to have the trans drag on the engine. Usually it will take a little higher RPM while releasing the clutch from a dead stop so you don't bog the motor, and really light flywheels have a tendency to be clattery ( like a UPS truck ).

Notice the Mopar performance flywheel is right in the middle as far as weight??? 18.5 Lbs ;)