Yes, this should be an easy choice.
The Spurs beating the Mavs would just show that the Kings would have eventually lost to the Spurs in either the 7th or 8th seeds. If the Mavs beat the Spurs, then the Kings may have been able to avoid the Spurs altogether had they gotten the 7th seed. So based on the fact that I hate to regret, go Spurs.
The Spurs beating the Mavs would just show that the Kings would have eventually lost to the Spurs in either the 7th or 8th seeds. If the Mavs beat the Spurs, then the Kings may have been able to avoid the Spurs altogether had they gotten the 7th seed. So based on the fact that I hate to regret, go Spurs.