What some describe as a clunk, I see more as a sound of reassurance. This is no toy bike. When it slaps into gear, you know it. There's nothing low rent about it. If you want sport bike shifting then buy a sport bike. This is 1300cc of raging power. And yes, if you're in too high a gear, you'll know it. The Stryker likes to rev at the mid to top of the rpm range, right in the powerband. With experience, you'll manage it quite well.
Stop thinking about it. Just buy it. You'll be hard pressed to find a member on this website who regrets his/her decision.