I currently take three10mg doses of adderall (dextroamphetamine and racemic amphetamine) ir over the day, but i dislike the crash. is quillivant/vyvanse less "crash"-able than adderall (dextroamphetamine and racemic amphetamine) ir?

Yup: Adderall xr, concerta, daytrana, vyvanse, quillivant, strattera intuniv, Kapvay are longer acting. If the onset is slow, the crash is minimal. Which is right for you must be determined by you and your doctor. Focalin (dexmethylphenidate) (both forms), Ritalin sr, metadate (all forms) are shorter acting more "crashable" than above. Eating or exercising at the anticipated crash time can mitigate the symptoms some.

Vyvanse (lisdexamfetamine): Vyvanse (lisdexamfetamine) is long acting and may help with the crashing. Talk to your doctor about possible switch to a dose equivalent to what u r taking.

Yes: yes. Both Quillivant and Vyvanse (lisdexamfetamine) are truly extended-release formulations. They do not leave your body is rapidly as Adderall. Because of the slower tapering, people do not normally complain of the "crash"