Sample the "performance indicators" screen.
You're interested in latch timeouts. If you only have a few dozen per second it's no big deal. A few hundred then it's time to start keeping an eye on it. A thousand -- you probably have a problem.
In my experience it doesn't matter much if you hyper-thread or not.
But if you can sell about half of those cores back to the vendor you could probably find better uses for the money.