Indeed, although you wouldn't just use 30km/s of delta-v to cancel the Earth's orbit, or 12.3km/s to escape the solar system. The Ulysses probe for instance use

Indeed, although you wouldn't just use 30km/s of delta-v to cancel the Earth's orbit, or 12.3km/s to escape the solar system. The Ulysses probe for instance used a gravitational assist around Jupiter to not only counter Earth's 30km/s orbit, but establish a counter-rotational orbit around the sun. My understanding is the ideal target would depend on the time you wished to launch, and the orbital phase of planets useful for gravity assists.