Barnes is a really nice player and we're watching him emerge as an NBA presence as we speak.
However, I'll take Kawhi - elite NBA defence and bball IQ, and a nice, varied offensive game that is developing all the time.
What I don't get is why we don't go to Kawhi more on offence. Against the right matchup he's great in the post, he can drive the ball, and he can even pull-up from 15 off the bounce. He should be a bigger part of the O than just standing in the corner most of the time - we should actually run some plays for him, especially when TP is sitting.